Need info on replacement part

Hello all, I am in the United States and I picked up one of your kits, K4601, at a rummage sale. The seller didn’t know much about it and it didn’t work, so I got a good deal, and now I am trying to make it work. When I opened the case and started looking at the solder connections and the various components I noticed that CV1 had broken off at one point. The legs are still soldered in the hole but there is no sign of the piece. I found an instruction sheet that calls CV1 a trimmer cap with a value of 5pf. I think this is supposed to be adjustable so I would expect the range. Could anyone help me out in either getting a replacement part or the needed range so I can find an equivalent part? Thank you.

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