In this episode Daniel builds and tests custom cartridges for the C64. Daniel reports the following.
“These are fan edition and they are not officially licensed products. I can’t provide links to order pages or similar sources but by following the projects mentioned below you will find all required information except for a direct download of the SMB64 rom.”
Skullcart thanks to @edu_arana
Zaxxon Replica / SMB PCB:
https://www.hackup.net/2018/10/super-zaxxon-replica/#more-1992
Magic Desk Cartridge:
github.com/msolajic/c64-magic-desk-512k
Basic Program on Cartridge:
hackup.net/2019/04/turn-a-basic-program-into-a-cartridge-for-the-c64/
SMB64 cartridge case:
https://www.thingiverse.com/thing:3853095