Hi Timi; email w/ schematics attached on its way now. Good luck searching for a parts donor amp ... and you need to be a little careful; there are no identifying marks, parts, gadgets, badges ... nothing, with the tubes out, to distinguish the two models; they are functionally identical.
Depending on how sleuthy and tech-savvy you are, if you compare the power supply and bias circuits schematically and physically, they aren't the same so if/when find a maybe, you can ask the seller what value caps/resistors are in certain places in the amp; that's the only way I'd know how to distinguish whether a burned out hulk ever hosted 8417s or not.
But having the schematics, I suggest you ask the question on the Hoffman Board; they are the brightest, least preachy, most helpful people ... if you're modest, they'll fall all over themselves trying to help you.
Good luck!