I use to own a 1910, much like your 1710. Put 3 water pumps on it before I got rid of it. Good little tractors.
Pumps should be readily available , New $$$ , They use to sell rebuild kits for the pumps. I let Ford NH parts man talk me out of the rebuild kit first time, He said they were hard to rebuild and did not last long. Rebuild kits still high $$ for what you get but about half the price of new water pump. If you are handy they are no problem to rebuild and last just as long.
Sorry don't remember prices - but brace yourself!! Don't get the fan belt too tight , that severely reduces water pump life.