these guys are obviously your friends. it sounds like they are trying to accomodate you in every way they can. is there a shop anywhere near that has the same kind of chair which will give you the support you need? maybe you can rent it, and from what you have said about your bud's they may even chip in to help pay the costs.
it sounds as if the damage was accidental.
i sure hope you get this sorted out and can make the trip home.

hugs and prayers