A Tom Miller 40" on Ebay

Looks like it is in good shape!

That would be a great piece to collect but I would think that you would have to be pretty tall to ride one. I am 5’8" and I have the seatpost bottomed out on my 36 with 140 cranks. I had thought about trying longer cranks when I first got it and I could not reach the pedal in the downstroke position!