We had a dog ramp for a 180 lb rottwieler I believe it was rated at like 200 lbs if I remember right ,one can also modify it with 1 inch square tube steel for added weight. Measure the wheel width ad 1 inch, weigh the chair and occupant I'm sure something is out there. Or have one custom built but it might get spendy.
My wife keeps saying I don't listen to her -Or something like that?...."My advice has no basis ,more reliable them my own meandering experience" Baz Luhrmann
2011 Sierra 355QBQ 1986 F350