Yep they exist ok, it may take a few days to get back to you so be patient.
Briefly: they're excellent, very laid back, the 172SP's are lovely aircraft and you should have no problem renting for extended periods. You may even be able to negotiate a 'dry' rate, which might be more convienient for you [saves keeping the receipts to claim back from RA on your return]. They'll tell you this though.
Oh yea, they did move to a brand new building at the end of 25L, they have a really good setup now....
Cheers
EA