Dean, As far as tool rolls go, I think you're definitely on to something. Just a thought, but future product you may want to consider is, what about amking something like your hood roll that could double over (one side can be a wrench side for holding a set of wrenches (maybe an SAE AND a Metric set) and the other side holds the pliers etc) then when it is rolled up, already has two sturdy handles that are send into the roll to carry. Kinda like a small duffle bag size in a way.
That way, you coudl eliminate multiple rolls (one for each wrench set, one for the other tools) and could have all tools there.
I dunno, just a thought. Realistically it would be your hood roll x2 built into one. Shit, I'd buy it just to get rid of my giant tool bag and keep my tools from clanking around. Let me know if you're interested in doing this as I'd be interested in buying one. Maybe a price you'd consider too