Where to find trunkliner / speaker box felt in Denver-Fort Collins Metro?

Anyone know of a good supplier of trunkliner (aka. speaker box felt) in the areas between Denver and Fort Collins? Found a nice supplier online, but shipping will be more than the material.

Looking for black / dark charcoal for covering hatches/tops of a false bottom.

Any leads would be greatly appreciated. Here's the online comp:
https://www.automotiveinteriors.com/ProductDetails.asp?ProductCode=SPKTL-4&CartID=1

 

https://www.homedepot.com/p/Traffic...-Choice-Length-Carpet-7PD5N620072HO/203469226

I just used some of this (in blue, though) to cover some plywood for a sleeping platform last night.

 

That looks good -- what is the backing like? Rubber, glue, or is the whole thing a weave?

 

Given I know next to nothing about carpets and etc, out of those options I would say it's either glue or the whole thing is a weave. I think glue though. Maybe.here’s a picture the roll off to the left is the back and laying down is the top. That’s the only picture I have of the backing.

 

Nice, thanks for the pic. Side note, your username is laugh-out-loud funny.