Finally got around to setup my MemCard PRO2. It's basically a SD-Card/MemoryCard adapter BUT it can run FMCB, OPL, automatically identify any PS2 game and create a separate virtual MemoryCard for every game. This works from real discs and even with roms from a NAS.
And this is really cool: the MCP2 can also exchange save files from physical games, emulators and even PS3 🤯 It's a bit finicky and I wouldn't throw out my old cards just yet, but there is a guide on YT.