Most shops stock gear...
I bring my own due to the loss of several friends over 20 years of diveing due to poor equipment and lack of training. I've seen too many people panic because they were not use to the gear they rented, and have seen several failures while in AC, one pressure gauge read 1500psi...the guy had NO air and was in panic mode. The same guy's vest failed..had a leak his buddy should have seen...they were both new divers and he surfaced with help.
In most cases, the gear is well maintained down there. Just look for the newest stuff they have or ask..they are great people down there and will go out of their way to help.