I have a strange problem you might be able to help me with. I have a friend who designed an insulated, chew proof dog access door for our mushing kennel here in Alaska. The design incorporates Mcculloch chainsaw clutch springs from ten ten and ten twenty series. I have shown my friend a thousand different springs, but only the Mcculloch clutch spring will do for him. I found a few while rummaging around small engine shops in Oregon, but I need another 40 more to complete all the doors. It's getting a little chilly here {10 above to 20 below} and the commercial doors we use now don't help much below 20. I sure hope you all can help me find some springs. I hope I can get springs, fabricate, and install the new doors before we get a cold snap. Thanks, Jeb2.