Fuck him at least once, that's mandatory to be able to talk to Beth. Talk to her about Del and ask to free him. She will let him go unmodified and he will be in Canadia station a week after you tell her to do so.
Non-slutty Trap!Del on Canadia station has literally no content whatsoever though, so I hope you're okay with him being free but entirely unsexable there for the time being. (At least until someone else (Hopefully) offers and goes to write lewd stuff for him)