Have you got a part number, serial number?
If you PM them to me I may be able to help you, my saw supplier has any number of odd bits and pieces and if he doesnt have it he knows where to get it, other than the diaphrams that I want at the moment.
You will be likely to pick a stuffed one up with no comp as thats what used to happen to macs most of the time, I had a fair bit to do with them about 18 years ago.
Im not a Husky fan, I hae found the ones that have given trouble have been major trouble and are hard to fix as well as expensive.
They are a powerful saw though but this is not everything in the world of chain saws, you need to know how to use it first so you can use all that power and it is amazing what a small saw can do if used properly.
I would in your case deffinatly look at the husky but then have a good look at the commercial Stihls, they are around the same price as a domestic husky and will last you a lifetime as long as it's looked after.

