In the spirit of supporting my beautiful country, are there any Canadian car audio manufacturers you guys know of? Even Canada based online vendors would be great. Thanks.

avi precision loudspeakers and amplifiers
www.avisound.com

and check out the top left corner of the page, there is a few there

Avi's used to be one of the best sounding speakers in my opion years ago but it's been over 10 yrs since i ran the Iasca circut. They were not cheap but you certainly got a quality speakers for your money.
I would however like to do my current truck in Avi so a list of current dealers in Ontario may come in handy if anyone has one.

i can hook you up with avi if you need, i have bben a dealer for over 10 years and could help you out if you wish