I don't know of a website that lists non-match pedo programs but I do know of a few programs that are non-match:
Children's Pediatric Dental Residency Program in San Diego
Tufts
Nova Southeastern
University of Iowa
Children's Hospital of Michigan
University of Toronto
I agree, it seems as though there ought to be a website that lists them. The best thing I've come up with is to visit the AAPD website, where they list all the accredited programs, then to compare those to the programs listed on the PASS website or on the MATCH website. It works, assuming the information is all up-to-date (which it seems it never is).