[Radioroslyn]

I'd be a little surprised if it is a paper cap. Typically if the value is  in the uufd or mmfd and that it's in the rf section I'd bet it's a mica or perhaps a tubular ceramic.
Value wise don't know that you need to be dead on as it's coupling the osc output to the mixer. 50pf or so +/- probably isn't going to matter.
I would leave it. Not much voltage there, if it's shorted or or open it will cause the mixer to work won't burn out anything.

Terry