Are there any numbers on that seal?
Fontana is a ways away and usualy quite a bit of trafic.
I didnt think to look for a numbers on the seals I will do that tomorrow.
If everything else fails....you might try this.
TEREX/EUCLID used gear type and vane type pumps in their buldozers. If it had a vane type pump, they used one or the other of a Hydreco or a Vickers. They looked just alike and some parts would interchange even, like the main seal and shaft in the pump. You "MIGHT" be able to find a Vickers seal for that Hydreco pump.