McPherson Flush Up Toilet Parts

I have a McPherson flush up toilet> It has a broken fitting on the back of it. The fitting is the nylon T fitting with the fill, flush, and outlet fittings on it. I understand that McPherson is now out of business. I have all the papers and diagrams for the unit. Does anyone know if anyone has parts for this unit?
I don't know of any other flush up unit on the market that I could replace this unit with. Can anyone help with this problem?
Thanks.
Lowell Sites

Seeing as we have no clue what it looks like and...

Doesn't seem to work anymore... At least since they went out of business...
Could you post a picture?