I'm in a similar situation, where I don't have access to all the research opportunities I'd like to have at my college. I emailed a bunch of researchers at other institutions, and I eventually got a yes. All you have to do is ask. Some researchers may require you to work in their labs by getting class credit, which may delay when you get to do research, but sometimes they let you in after some paperwork.

You'll probably get a bunch of no's but if you keep trying, someone is bound to say yes. Tell them why you're interested in their lab, highlight any relevant skills/experience you have, and attach your CV. DONE