Lets get on the same page:
Are you wanting the fitting that screws in the pump OR
the fitting that screws into the resavoir/rearend?
inotherwords the one about 1/2 way on the line you posted a pix of on ebay in your first post?
it is the fitting that receives the compression furrell and screwed into the resavoir/rear end.
If that one is the one you need, someone here might have one, if not then contact Floyds through ebay that you linked in your first post.
He is a large mower salvage yard and he just might list one on ebay for you.
Do you already have the suction line that you posted a pix of from Floyds?
EDIT:
Thinking I can't remember if the rearend/resavoir has a fitting that is threaded to accept the nut on the suction tube???
Dam, old age fogs my mind sometimes.