Generally speaking, closed-circuit rebreathers can't be rented. CCRs are a specialist apparatus, and CCR certification is against a particular model or family

Generally speaking, closed-circuit rebreathers can't be rented. CCRs are a specialist apparatus, and CCR certification is against a particular model or family of rebreathers – e.g. Buddy Inspiration/Evolution, Kiss Sidekick, Kiss Spirit, etc. Unlike open-circuit scuba certification, there isn't a generic "CCR certification". Anyone intending (and qualified) to dive to 100m+ on a rebreather will certainly want to do it on their own equipment.