I use various Etsy sellers for the labels, but mostly Matthewmods now for quality consistency. The pinball PCB was from AliExpress. The blue shells were also AliExpress but different seller. Prism is an MBC3000 by Benvenn. The two Tetris carts and Zelda have legit Nintendo PCBs, modded to use FRAM for saving without battery. I assembled them myself.
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi