anytime bud i think they have a pretty basic website chromedepot.com but it doesent do the place justice on what they got, your better off callin and its by far the cheapest place i have found

 

Check your local CAT dealer. I'm southern ohio, but the CAT dealer down here in Cincinnati they have a parts department, and a used section where we're allowed to buy the stacks. I needed a clamp, and CAT stacks are the same size as mine, and i used their clamp. Not sure if ya'll got any CAT dealers up there, but if so, check with them since they sell it down here.