"Draganflyer in Saskatoon supplies larger LiPo battery sizes and there are others.... e.g. a Hobbyshop in Swift Current that sells MRs almost exclusively to the RCMP.
But at the end of the day, I think you can still buy them from HK International for…"
"Commercial carbon fiber sheet is thinner than you require. You probably want carbon fiber plate. However Carbon fiber in plate or sheet form lacks significant strength on the z axis even if it is quasi-isotropic. Sandwiching a lighter material…"
"Easy to obtain the Carbon fiber fabric and the appropriate epoxy (do not use polyester resin epoxy). Easy to make flat sheets and tubes of various diameter as I have done already. Cost? CF fabric is about $75 per yard * 50 inches wide. If labour is…"