Thank you all very much for your help. I would have never guessed in a million years that I would find my answer in Barbies. That's exactly what I was looking for, I just need to hack off the armrests and push handles, paint the upholstery black and the frame candy apple blue and that's pretty close to my 1:1 wheelchair.
Yes, das_soldat I considered hacking up my DID BMX bike, but it is such a beautiful work of art. Will post pix of it, err me when I'm done. Mini-me that is. Thanks again.
:jump4joy