Or are you referring to these Custom Shop M-70s? I know I've seen a few in different colors, and I recall seeing one with P-90 soap bar pickups. Can't tell you about quantities, though.
I know the Guild Custom shop did a run of a dozen models based on the M-75/Bluesbird. Here's the listing for one at Andertons in the UK. It differs from the M-70 in that it has four control knobs vs the two on the M-70, as well as no clear pickguard. It also has a more standard stop tailpiece instead of the slanted Guild tailpiece.