OMG! Just saw this. Awesome job, @Day! 
By the way, I used to make lists of some stuff too and remembered I created this list (posted on my LINE timeline dated Sept 2017) of rare party drop items that still drops up to this day. I think this is worth adding on the main post. I'll just copy-paste my post here and add the images. (Feel free to make your own version of the images coz mine is just messy, I think I edited it in a collage app. lol)
These items...
And where they can be obtained...
RARE STAT ITEM PARTY DROPS
Updated List by Geass
1. HOT TUB (Limit 1)
Stats: (10,000/10,000)
All VIP Pass Parties
2. CLOUDPACA (Limit 50)
Stats: (30,000/30,000)
Cat Cafe
3. MOUSTACHE (Limit 1)
Stats: (0/60,000)
First World Problems
Blue Plate Special
Arcade (Mis)fire
4. HOT WINGS (Limit 1)
Stats: (70,000/0)
Restless Keg Syndrome
IT'S BROSTEP, BRAH!
5. POPSICLE (Limit 1)
Stats: (80,000/0)
Cosplay Please
6. CACTUS (Limit 1)
Stats: (0/80,000)
Back Alley Debut
Art Starzzz
Hype Machine
7. HEALTH WATER (Limit 1)
Stats: (90,000/0)
Skyhigh Party
Limo Luxury
Just Dance!
8. BUFF PUP (Limit 4)
Stats: (100,000/0)
Fitspiration
9. BABY KITSUNE (Limit 50)
Stats: (60,000/60,000)
Cat Cafe
10. TOP DOG TROPHY (Limit 1)
Stats: (140,000/140,000)
Frisbee Follies
Restless Keg Syndrome
Enjoi J-POP! (PRO)
Cosplay Please (PRO)
Counter Culture (PRO)
11. BENTO BOX PRO (Limit 1)
Stats: (200,000/100,000)
Cosplay Please (PRO)
Cat Cafe
12. LUCKY BUB PRO (Limit 1)
Stats: (100,000/200,000)
Anime Expo (PRO)
13. 3-LEGGED SHELTER DOG (Limit 1)
Stats: (0/300,000)
Arcade (Mis)fire
Blue Plate Special (PRO)
First World Problems (PRO)
14. DIRTY POSTER (Limit 1)
Stats: (0/320,000)
Restless Keg Syndrome
IT'S BROSTEP, BRAH!
15. PANDA (Limit 1)
Stats: (0/320,000)
Cosplay Please (PRO)
16. SEAL PUG (Limit 1)
Stats: (350,000/0)
Back Alley Debut (PRO)
Hype Machine (PRO)
Art Starzzz (PRO)
17. WHITE TIGER (Limit 1)
Stats: (400,000/0)
Skyhigh Party (PRO)
Limo Luxury (PRO)
Just Dance! (PRO)
Cat Cafe
18. SCHOOL UNIFORM PRO (Limit 1)
Stats: (300,000/300,000)
Big In Japan (PRO)
Cat Cafe
By the way, I used to make lists of some stuff too and remembered I created this list (posted on my LINE timeline dated Sept 2017) of rare party drop items that still drops up to this day. I think this is worth adding on the main post. I'll just copy-paste my post here and add the images. (Feel free to make your own version of the images coz mine is just messy, I think I edited it in a collage app. lol)
These items...
And where they can be obtained...
RARE STAT ITEM PARTY DROPS
Updated List by Geass
1. HOT TUB (Limit 1)
Stats: (10,000/10,000)
2. CLOUDPACA (Limit 50)
Stats: (30,000/30,000)
3. MOUSTACHE (Limit 1)
Stats: (0/60,000)
4. HOT WINGS (Limit 1)
Stats: (70,000/0)
5. POPSICLE (Limit 1)
Stats: (80,000/0)
6. CACTUS (Limit 1)
Stats: (0/80,000)
7. HEALTH WATER (Limit 1)
Stats: (90,000/0)
8. BUFF PUP (Limit 4)
Stats: (100,000/0)
9. BABY KITSUNE (Limit 50)
Stats: (60,000/60,000)
10. TOP DOG TROPHY (Limit 1)
Stats: (140,000/140,000)
11. BENTO BOX PRO (Limit 1)
Stats: (200,000/100,000)
12. LUCKY BUB PRO (Limit 1)
Stats: (100,000/200,000)
13. 3-LEGGED SHELTER DOG (Limit 1)
Stats: (0/300,000)
14. DIRTY POSTER (Limit 1)
Stats: (0/320,000)
15. PANDA (Limit 1)
Stats: (0/320,000)
16. SEAL PUG (Limit 1)
Stats: (350,000/0)
17. WHITE TIGER (Limit 1)
Stats: (400,000/0)
18. SCHOOL UNIFORM PRO (Limit 1)
Stats: (300,000/300,000)