eppo said..
anyone know where I can source one of these. Having no luck looking.

Mate you could go custom with SURFAIDS.

Full disclosure I have no commercial interest.

Hey man
Had the same problem trying to find one in NZ so I got my Canvas guy to convert my 8'6 FO bag by getting the tail cut and velcro added so I could travel with foil mast in. I then got straps stitched in to nose to allow me to bend back nose onto a large velcro pad and secure. When i want it for my 8'5 Speeed I simply extend bag out again..cost me $40..#winning

Chur

Definitely Surf aids at Byron Bay. They make custom covers at a very reasonable price