Everyone keeps claiming all this is OOC, and you guys are using the word way too freely and incorrectly, in my opinion.
OOC stands for Out Of Character, and is commonly used to refer to actions that your character would NEVER do no matter what, and it is completely wrong for that character to do these actions. Example - A paladin walks into a church, pulls out two flintlocks, and says "ding-dong" as he blows the congregation away without any prior RP leading to actions like that.
Having citizens deny service to a horned, twisted, obviously evil character? Not ooc. No fix needed. Sorry, but Barovians just don't like calibans.
Having to use the only friendly cleric faction in all of barovia to raise your caliban buddies? Not ooc. Maybe annoying, maybe very risky, maybe not ideal and you are not expected to ENJOY it, but if your character wants that body to be alive again, he's going to suck it up and use that ML cleric. It's not Out Of Character for him to go to extreme measures to get that body alive.
HOWEVER - If what you are trying to say is that your character actually would never use that cleric no matter what the circumstances are....then YOU as a player are being untrue to your concept and are in fact acting oocly. That's something you should look at yourself and take steps to fix, as it's not ok to engage in that kind of behavior.
I don't think it's fair for people to go on the forums and be all "Every twist who uses the ML faction is being OOC and Cheesing", then secretly do it themselves but "feel bad about it". I've seen caliban walk into the temple and type "//Not really here, just doing a raise" Which is just a pathetic attempt all around. It's not "OOC challenges" that you are facing, its totally IC, reasonable challenges that can quite easily be overcome if you are willing to put effort into what you do. Is it harder? Yeah. But that's what you are asking for by basing your outcast in the drain.
If you ignored everything above, at least read this part!
You are allowed to hire topsiders to buy you stuff from stores you can't access, btw.
Oh, or here's a crazy idea... Someone invest in CHA and influence, and play a caliban who can disguise himself and pass off as harmless enough to use the stores/turn in bounties in barovia! The player of that character would be utterly rich and universally loved among caliban just charging 10% of all coin that changes hands through him for his services that he would have a monopoly on.