ISO Wheel Chair (Novato)

Looking for a non-electric wheel chair in good, working condition.
Does anyone have one to donate or for low cost that I can pick-up? Preferably a collapsable one.
My Great Uncle recently fell and broke his knee caps.
He only needs to use a wheel chair for a month or two, so we are hoping to avoid having to buy a new/full-price one which we can't really afford right now.
Thank you for your help and Happy Holidays!