RPC1 Firmware for BTC DVD-ROM/CD-RW Combos?

There are no RCP1 firmware versions for any of the BTC DVD-ROM/CD-RW Combo drives over at rpc1.org. Does anyone know if any exist (somewhere else to look) or is it just that the drives (e.g. BCO-5216IM) just are not mainstream enough for people to start hacking?

I’ve never seen a post about these drives. I assume that very few people have them. I’d imagine that they wouldn’t be too challenging to patch if someone wanted one…