Quoted from fattrain:

Gene needed an original Kingpin to replicate parts and most Kingpin owners were not willing to oblige.
I heard one story that a paticular owner said ok on two conditions:
1. You must pay a deposit (I can't quite remember if it was 50k or 100k)
2. Only Mark Ritchie himself can tear down the game
Obviously nothing ever materialized. I also heard rumors that the software work needed to emulate / replicate some of the capcom chips was holding him up as well....