I hope Auntman67 didn't send PM you his mailing address. I'm trying to think which Happy Days cast member has had the most amount of roles. I know Tom Bosley was known to appear on Murder She Wrote, but I have a feeling Henry Winkler has done the most acting unless you count Robin Williams from the Happy Days spin-off Mork and Mindy. Pam Dauber was hot. I wonder who they'd get to replace her if they brought back that show with different actors. I wouldn't mind having Cathy Silvers' autograph.
Take care and God bless