Applying to A2 help

I've gotten into the situation where I am repeating the AS year in a private college, which you have to pay for. I've been working really hard to get good grades this year and go to a normal college for A2.
Problem is I cant find any college that does edexcel for the 3 courses I am doing now. Im really scared that even if I get good grades this year I wont be able to go into A2 since I don't have the same exam board as the colleges I want to apply to. Is it even possible to go to a college for A2 that for example does Aqa biology, where as I've done Edexcel Biology.
:frown: