Campion is the best! And an absolute gem of a show. One of my favorite Peter Davison roles ever.

I was so sad they didn’t do more of them, he’s perfect casting

Have you read KJ Charles' Will Darling Adventures? It's a trilogy. If Albert Campion was gay, and instead of an ex-con employee, his sidekick is a former WWI trench fighter with trust issues. Set in a book store! Glorious 20s fashions! International crime syndicate! and (unlike Campion) Sex!