I believe delivery costs for a full aluminium extrusion vs a roll of carbon cloth distorts the price for some ppl in certain out-of-the-way locations to the point that homebuilding in carbon becomes the cheapest option. That is the argument being put forward. Ignoring this aspect will certainly put aluminium extrusions ahead of carbon in price, but it isn't always that simple.

My personal experience was trying to buy a replacement mosquito mast a few years ago. If I lived near the major fleet it was a cheap exercise to just drop by the class stores and drive away with it for something like $300. I could not get one of these shipped to Brisbane, issues with length and fragility. So instead I had to search for alternatives locally and found a windrush mast supplier (which turns out to be very similar, it not the same), but the cost was near $700. At this price, it was nearly worthwhile building my own carbon mast, with easy availability of materials and my own labour. Maybe I didn't look hard enough for a viable transportation option.

But back to the topic. Where can I get some of that shark skin film?