Do a search under "undergraduate summer internship" or something like that...you'll get a bunch, some which have summer stipends and some that don't. I think Iowa State has one as does UT-Southwestern.
If you have the money to not have to get a stipend, then you can basically do research at ANY institution you want...just contact a professor...
most liberal arts schools are located somewhat close to a bigger research university...are you? can you look there? the great thing about doing research at your own institution or somewhere close by is that you can continue it during the school year if you like it...just something to think about.
BonBon