Big help, thanks so much.

SO here are the end results I found. I sent an email to Lord and they confirmed that the J7402-5 is the recommended mount for the 180hp Comanche, but it no longer has PMA and would need paperwork for field approval. They said I could use J7402-20 without paperwork as it is PMA and only differs in that it is slightly stiffer in the shear component. I also contacted J&J Aircraft Parts and worked with Roxanne Dentier who was very helpful. She in turn contacted Piper and Piper told her the new part number 475-121 was not a stock item and would take 139 days, and that was a maybe. If you have a 180hp Comanche needing mounts you have the option of the -5 with additional paperwork, or the -20 with no paperwork. YMMV.