Wheelchairs & OT for person with PMLD Hampshire Area

Hello all :sunny:
My sister in law (early 50s) who has PMLD desperately needs a new manual molded wheelchair. She is incredibly uncomfortable and unsafe in the one she has. Local wheelchair services are not helping, so she must go private to buy herself one.
We are looking for advice and signposting for comfortable manual molded chairs (her social worker & home manager are organising OT), any advice and recommendations gratefully received.
It’s an expensive business and we want to get this right for her. Thank you