I'm totally envious of your machine. I think that's about the only machine that would replace my cast iron 201, maybe along with one or two of of the old cast iron zigzagger models. I have been looking for a 117 to turn up localy for a couple of years now.
I don't know about replacement hook and race on your machine. It looks like it takes the same bobbin and bobbin case as the later rotary flatbeds like 540 and 740, but I can't see any info on other parts. I can't make sense of the photo, but you would notice when the race and hook is missing, it is the circular (moving) metal part with a hook that picks up the upper thread and brings it around the bobbin thread; interlocking them and making a stitch.
The parts are problably similar to
these. Seller lists 117 as compatible model, but hard to know for sure until you get the parts.