Not sure if this is the correct place, but at least there are shotgun shooters here. Would consider complete press. Not sure how much the conversions go for but I think the last price I saw was about $250 so let's start there.
there was one setting in a pawn shop near me for quite some time I'm not positive if it's still there. and you have to get it shipped to you being as it looks like I'm quite a ways from you. if you want the phone number for that place just send me a PM and I'll get you their phone number