A collection of somewhat active stores that sell/have sold physical souyo merch!

bigcartel

• 0610sijia
• catnatch
• chergeegee
• creylune
• grimfantas
• lilpong
• linvaniin
• ribbons
• spankmaths
• zipsunz

etsy

• AmeBluShop
• Ammosart
• ARYLLINS
• CHANNEL1200
• CichoriumArt
• CocoKoalaTea
• daihaiba
• deepseasecret
• Denpasei
• doodlerooos
• EdenFire57
• errisao
• JennyQPeng
• Kenmageddon
• Kurabeans
• OtoMall
• Say0ranArts
• shanscamoosh
• SumFoolishMagician
• UltraSequel
• Wizwares

Homu

• strangersyndrome

inprnt

• kaz
• kino
• Peachymints
• Sky

ko-fi shop

• blue_bird_luna

redbubble

• 15kitzchii
• ghuoulish
• kiss-my-arte
• lemontoffy
• prirro
• prrtnrr
• npuddeph
• riinkanei
• SaikoNoHero
• vaddia

Currently only listing merch that depicts just the two of them together or individual merch where you can get both of them. For personal photos not my own, I linked to the seller.

Figures

Persona 4 One Coin Grande Figures

 
Happy Kuji Persona 4 The Animation Figures

 
Megahouse Persona 4 The Animation Chess Piece Collection

Plushes and Dolls

Kotobukiya Pitanui Persona 4 Plushes
(these are ONLY souyo)

Great Eastern Persona 4 Golden Plushes

Persona 4 The Animation Taito Plushes

Persona 4 Golden Kadokawa Nui Dolls

Charms, Stands, and Pins

Other

Junes Thanks Fair 2012     Voiced Alarm Clock

Persona 4 Primaniacs Fragrance

for a guide on how to buy merch via Japanese proxy, here is a useful guide! There's a lot of useful terms to use in searches as well.