Hi.
I don't have any experience about CF case makers, but the price-point is such that outside custom manufacturing I can't see 'em ever becoming very popular.
AFAIK the average cello that gets a
hard-case is priced around $5000, and an average BG that gets a hard case, 2-3 hundred.
While a CF case would be nice, the average BG or guitar player wouldn't dream of dropping that kind of dough on a "plastic" case. Not on one that costs more than their bass anyway

.
There's all sorts of small scale CF manufacturing going on, and if You don't need anything very special, most of those shops will roll one for You.
Regards
Sam