I'm looking for a 15X16 (or the depth could be greater, because I can always move the backrest forward) Tilite ZRA. I could do 14X16 too, but 16 width is too wide. ^.^
I was bidding on one on eBay and it sold for WAY more than I could afford, and it was perfect too. Sadness!
This is probably stretching it, but my perfect chair is:
18 or 19 front seat height
15 rear seat height
85 degree front frame
10 inches (ish) footrest width.