My .22 BSA Scorpion Mk II air pistol could do with a spruce up - new O ring, possibly a new spring and maybe even re-blueing - in other words a general service. I am having trouble finding someone to do it. I guess it could be posted, though it's pretty heavy, but someone relatively near by might be better. I am mid-way down the Welsh border. Any suggestions gratefully received (and no, I would not consider doing it myself!)