No, in fact, you can't even buy the o-rings separate from Ford AFAIK. They just sell the whole valve.
Any place that sells o-rings can fix you up. Viton is the preferred material, but Buna-N has been working for me for quite a while (over 1-1/2 yrs). For Viton o-rings, try
www.mcmaster.com or
www.oringsusa.com
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First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version

), AIS,
coolant filter w/"hokum" bracket, regulated return,
heated mirror mod, lighted cupholder, Marinco heater plug-in.
Hard or no-start? Check Here