Ok raceboard gurus, where do i get a quality boardbag to suit a Speed SR250L size board? What brands? Where to purchase? Thanks

What are dimensions???
Go to local sailmaker with closet fit and ask for cut and shut.
If you were in tassie dad would do basic modification for you.

Found a few options in 12'6" SUP bags. Prolimits ,Flying Objects, Bic etc.

Some upholster/canvas repairs make them if you give them the specs. couple of locals on the Sunny Coast do good board bags on request. Will send a text to you.

try these guys, I know they make bags for guys to transport stuff right up to OC1 canoes:
Big Mal custom board covers
U 20, 4-6 Hawker St Currumbin, QLD, 4223
(07) 5525 6338

Check out SUP bags too

12'6" Prolimit Evo. Not sure if black is ok. Board will be on roofracks a bit.

Severn make a board bag to fit the Phantom 377

The Prolimit bag is white underneath, so you could mount your board upside down on hot days.

It fits a Starboard Phantom 377 quite well, so should fit your Speed as well. The only complaint is it is made for a SUP and the center handle is mounted slightly non centre for a Racboard which is slightly tail heavy.