Special needs shower chair (Roslindale, MA)

My son is special needs, (Down Syndrome, stage 4 kidney failure)) Hip operation 3 wks back. Still in hospital but need to find a chair for shower if anyone has one Sure I will be needing other items after physical therapy in the next few weeks. Had 2 chairs for my uncle but donated them a few yeas back. Any help in Roslindale area will be so appreciated. Absolutely can pick up.Thank you in advance. Flo