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try Vaughans in Upper hut for parts. He's the gamo importer and may have the part equivalent or even an old rifle to get parts off.
whats the bore damage that it needs honing?
If your just...

I use the the full strength loctite.
I only use it on the end few threads, if I can see the end of screw where it threads in I'll screw it in till just about all way in then put a small drop on...