Thanks for the help Guys, I have never heard of MAc 1 but will have a look at their site and will use them if nothing turns up here that is affordable. $200 is still not bad for a decent (classic?) air rifle? Importing stuff may add a little to that...
Its a bit surprising that the Sheridan will exceed 12ft/lb, what do they go up to? I had it in my head that they were a plinker type rifle rather than a hunting gun, having asked that do the Crosmans exceed 12ft/lb in the US?
I will now have a sneaky look for parts for my ugly non working Crosman-it will probably thread every screw if I managed to find the parts anyway