Something along the lines of a Howard’s 723515-12 would meet your requirements.
The availability question could come down to whether or not they have a core(a blank) small enough to facilitate that grind.
Yeah that looks like a good grind. We use Gaterman lifters and I think that the Howard hyd roller lifters are sourced from Gaterman so they should be okay. OP will need to make sure his valve springs match the new camshaft.