Old technology Stiffy drive replacement

Question

I need to replace 2x Chinnon FX-354 stiffy drives that are the storage medium for 1992 KRAUSS MAFFEI INJECTION MOULDING MACHINES REMAK MC3 Robot System.The floppy 15 pin D output on the midi frame are fed to a 9 pin D connector on a CR 100 (I assume)interface card with a 34 pin header socket that connect to the Stiffy drive. The drive is strapped as drive 0. Two pins called PJ3 are strapped together. Power is via the usual 4 pin power connector. I want to replace these drives with new available ones or convert to memory stick if possible.Borrie