Flying Objects bags will do it, good design, well padded, fit dug-out type boards. Full length plastic zip and good handles each end. Even have tensioning straps all round to take up the slack material. Any Starboard dealer can source them.
Or get in touch with the Auswind guys directly
www.flyingobjects.com.au/contact-us/oceania/australia/

How wide is your 14'?
Nothing more annoying than on oversized bag flopping everywhere when carrying or transporting.
I have a flying objects bag which I use for my 27.25" and 24.75" falcons. It fits the big bulbous nose every well but is way too loose in the tail. It is a great bag though and it does offer good protection to the precious cargo.
The other option is to get a custom bag made these usually cost about the same as a production bag

We have ION core bags that are a good deal thicker than most and have extra carry handle on the side of the bag as well as the top of the bag - fits the falcon 14 x27 with heaps of room to spare ....