The Roland MKS-20 is a rackmount module known for its “Electric Piano 1” (a hallmark 80s pop sound) and “Ensemble Strings.” It is not a Kontakt library by default.
You are likely looking for a Kontakt version of the MKS-20 sounds. i--- Mks 2000 Kontakt Download
The i--- MKS 2000 is a sampled recreation of the classic MKS-2000 soundset, tailored for Native Instruments Kontakt. It reproduces the warm, pad-focused textures and evolving timbres that made the original module popular in ambient, film, and synth-pop productions. The Roland MKS-20 is a rackmount module known
Once you find a candidate website, check: Are there audio demos