I'ts been obsolete for more than 10 years.
SeaLand Technology bought Mansfield in 1984...they haven't made a manual toilet since. Chances are, yours is a 752...they discontinued parts for it--even repair kits--about 5 years ago. So...it's time for a new toilet. Forget looking for one that will match the bolt holes in the head sole (floor)...you won't find one. But that's hardly a reason to choose a piece of equipment anyway. I happen to be partial to Raritan toilets...the PH II has been around forever and has always been considered the best manual toilet in its price range (around $200)...the Cricket has only been around for about 5 years, and is a bit different from any other toilet...instead of the usual piston/cylinder pump beside the bowl, it has a diaphragm pump under the bowl, so it needs less space. It also needs less maintenance, 'cus there are no moving parts to wear. Check 'em out on the Raritan website at www.raritaneng.comOr...you can go cheap and buy a "disposable" (for the price of two rebuild kits you can buy a whole new one) toilet...Wilcox Headmate, Groco HF, or the manual Jabsco.