Y-E Data drives in 3174s were available as 5.25" 2.4MB options (require ED diskettes). I wasn't aware of any entry of them into the PC Server Options...
Well, I have a boxful of NOS IBM FRU 96F9100 16MB ECC SIMMs, if you're interested - asking £5.00 per pair plus P&P.
I also have an MCA Mafia contact...