If I could afford the PF and plastics, I'd probably bite. That is if I could afford the rest of the parts. If a PF is available, the BG and Plastics (repros all of them) are available and a whole new game could be built. Guides and other parts, the entire wiring harness, etc. would have to be put together, but it would be a fun challenge to build a Centaur from scratch.
What would be really cool is if someone (now it would be Planetary Pinball) would repro entire games. Won't happen, but it'd be cool. I'd love to see the top 50-100 machines get a few thousand repros built, all new parts, new cpus. Dreaming...