I agree, he's due for a reissue. I think there was an LP in the "World of" series, it was advertised on the insert to another LP I had, but that was in the days (early '70s)when I had discovered a good source of second hand LPs-mostly jazz & blues- so it was probably already unavailable, or I'd have looked for it then!
I learned his songs off the radio (?early '60s?)so they must have been broadcast fairly frequently, though I can't bring any of the other titles to mind.
I've just had a quick look at AMG and a couple of UK record store sites and he's "unknown".