I am not a parts vendor. Here are some known vendors of new and used parts for the 600 series in no specific order. I have purchased parts for my restoration from some of these vendors. Click on the picture to go to their website or ebay store. Some of the sites have dead-end links.
There are also some links to other Honda 600 sites with interesting stories.
www.Honda600Store.com - Olaf Bleck
honda600carparts@gmail.com - 617-513-9841
www.Honda600Shop.com - Mike O'Connor
tmoc1990@aol.com - 704.880.7878
Honda600coupe.com - Bill Colford
billmyong@earthlink.net - 617.513.9841
Miles Chappell ebay Store
Ray Cave ebay store
Tim "Merciless" Mings - Tim Mings
h_mings@aol.com - 818.335.5165
B & B Automotive
Honda 600 Roster of Owners
Honda 600 Coupe and Sedan parts availability
Steve's Honda 600 Coupe
Bills Auto Works