Know those records that you insert into a vinyl record player? Basically those, but pirated since a real one costs money when you purchase them at official music retailers. It involves the process of obtaining a legal copy then using wax molds (to recreate a record) and specialized tools (prevent quality loss) duplicating the record. (Also, “Bone Music” existed in the Soviet Union by printing music by using x-ray films).
Probably at a time, but it would be stupid to do it now. Music is more or less free at this point and most people would just want a digital download. Vinyl is bought today mostly for keepsakes/to support the artist. You can probably get away with using one of those custom vinyl services for your own usage if you really want something in vinyl form.