Throttle shaft seal Bobcat 743

Boy, a lot of things going bad in a short time.
I have an oil leak where the throttle shaft comes out of the plate on the Kubota engine. Is there an o-ring under there or is it a special seal? If an O-ring will one out of a standard O-ring kit work or get one from bobcat/Kubota dealer? Also has some side to side play is that normal or is it maybe worn?
Does the whole plate have to be removed to get at the seal or can the lever be removed and the seal accessed from the top?

Thanks,
Al.

Throttle shaft seal Bobcat 743