According to the Wikis : One of his proposed prose books was about his relationship with Jim Morrison (Richmond's style influenced the poetry written by the front man of The Doors), but the publisher backed out.
Yes, does seem to be some connection.
The connection between Richmond and Morrisson has been extensively described in Buk Scene: https://bukowskiforum.com/threads/a-new-charles-bukowski-inspired-magazine-buk-scene.3778/
Gagaku Meat: The Steve Richmond Story, by Mike Daily.
Gagaku Meat is a 32-page special feature including rare photos, book covers, letter excerpts, ephemera and more.
Daily interviewed a lot of poets, writers and publishers including Gerald Locklin, FrancEyE (Frances Smith, mother of Bukowski's daughter, Marina), John Martin, A.D. Winans, Linda King, Ron Androla, S.A. Griffin, Alan Kaufman, Mat Gleason, Billy Childish and many others.