For what it's worth, I purchased an SVT exhaust from Zach last summer and there were no problems. Having met him for all of 20 minutes I can't say that I know him well enough to vouch for him - what I would say is that although he can be difficult to get in touch with, he isn't in the business of scamming people. If he says the part is in the mail then I would believe him - I'd put more blame on Canada Post - between Canada post and cross-border customs brokers I've had my fair share of service delays!!!
Eric