@shanesemler @klangverstromung @amadeus
Funnily enough I also use the Ugritone drumkits myself! They support Linux!
The Linux VST3 doesn't work for me, but the VST does! I put the Ugritone .so file into ~/.vst - make sure REAPER checks that path for plugins.
Then you should be able to use the plugin in REAPER, tell where the sound files live and you're good to go!