The website for Arlen Ness Vegas does not mention rentals but if you want to find out you can call them - (702)440-6377.
Eagle Riders website says they rent Victory's in Vegas. I'm not sure which models but you can find out - (888)900-9901
There's one other place that I found that rents Victory's in Vegas but it may not be quite what you are looking for. Paste the address below in the address bar of your internet explorer if you want to double check