2MB CHIP RAM replacement PCB's for A500+ and upcoming A500++ boards - English Amiga Board
MegAChip 2MB CHIP RAM by DKB for Commodore Amiga 500 2000 2000HD 2500 – My Amiga Shop
Lotharek's Lair
2MB RAM Amiga 500+ chip RAM mod :: BooBip.com
I recently developed a popular board called RAMesses, which upgrades an Amiga 500 / 2000 / Commodore CDTV to 2MB of Chip RAM without any soldering" : r/ amiga
RAMesses II Amiga 2MB Chip RAM upgrade from Retro Supplies on Tindie