thanks to all who responded about pads (Brett Dikeman)

[Michael, Dave]

Brett,

A bit late, but:

I am 90% sure that the brake pads from an BMW E36 M3 will fit UFOs - I
saw the same cross reference somewhere. Do the UFO calipers use pads
that have a 3 pronged clip that snaps into the piston? If so, that
increases the likelihood that the above is true. If you want to swing by
Newton sometime, I have my old pads that you can test fit.

Dave