you dont have to permanently acquire it, only use it for some time. the corpse isnt damaged or reduced in value by having sex with it, so morticians or people working in hospitals should be in the position to get their hands on bodies.
imagine you bring your shoes to a cobbler to have them fixed and it turns out, he has a fetish for shoes and used your pair to satisfy himself. do you think that is a crime on the cobblers part? maybe it made the leather smoother and he did a great repairjob or he is charging comparatively low prices. anyway, you may think about giving him business again, but you could not call the police.
hmmm, now i am beginning to ask myself, why the undertaker, who burried my father, had so competitive prices.