Fortunately I can do AutoCAD, which meant a quick email was all that was required to get the design over to the company (cut-tec.co.uk). Would have contacted a fellow ribnetter had I realised you had access to such a toy.
Must say I was a little suprised however, when I got the panel back, to find the fixing holes around the square opening were in the wrong place. After a bit if cursing I realised the dimensions in the VW Marine installation book were wrong
by a couple of mm, and that the panel was exactly as I had specified. Took a while with the Dremel to ovalise the holes to get it to fit.