Thanks for the help guys.
I did ask at Lordco, the fellow there said he had no listing for the seals.
While cleaning up some other stuff this evening, I came across the remnants of an old gasket kit that I didn't know I still had. It happened to have the seals in question. Thanks for the offer though Tony.
For future reference, if anyone's interested, the o-rings are a 36mm x 4mm, buna-n, 70 durometer. Available at some seal house in town for about $ 1.25.
For the benefit of other certain members, that translates into : about the same diameter as a TimBit, about as hard as a 5 day old Fritter, and slightly darker in colour than a chocolate chip.