Where to Find Winchester Barrel?

[Diablo]

I have a whichester 1300 with a 20-something inch barrel. Where can I get an aftermarket 18 inch for it?
Thanks...

[Brent]

I bought a 22" barrel directly from the factory, and it was a nightmare. The person taking the orders is totally clueless about Winchester products. Winchester shipped the wrong barrel, and I had to make zillions of phone calls, send faxes and letters to get it straightened out.