Ok re-read your comment there...
If you did find one that does this, I don't know if it's gonna work like a mass storage device..
The mpc expects the data to be sent in a certain way over scsi... and the software that recognizes samplers is expecting to send to an mpc in a certain way over scsi....

The way the insides of the mpc 1000 work, it treats it more like a disk, and thus you can just drag them over..

I could be totally wrong but I don't see it really working... only shot is to try it :)