M_Boats: Mast-up cover

A while back, Craig wrote: "I'm thinking of pricing a sailmaker's fit cover that would allow me to park her near the water with the mast up and I suppose such a cover would be effective in a slip, also. I imagine a cover would also protect from the vagaries of ultraviolet rays, which would prolong the life of the sealant." I have been thinking about a mast-up cover for this sailing season, too. Does anyone know of a source who knows M-boats? Might be easier than taking it to a shop to have it measured. Bill Riker M-15 #184 Storm Petrel