Renting a Triathlon Bike

Hi everyone! I'm doing my third full Ironman and currently have a road bike from when I did my first a few years ago.

I'm interested in using a triathlon bike instead of my road bike, but I really think this might be my last triathlon, so I'm not at all interested in buying a new bike.

Is there some place near Houston that happens to rent tri bikes? Or even a place that may sell used tri bikes?

Thanks very much