It might be useful to look up several medical-equipment-rental places in the local Yellow Pages. The ads alone may tell you, but if not, phone the most likely-looking ones and ask them whether they take Kaiser's insurance plan. Renting large medical devices like hospital beds is much better than buying - for one thing, if it breaks, they just bring you a new one and take away the old one, rather than you having to wait for someone to come fix it.