I'm surprised Styleflip don't do one. Maybe you should ask on djforums, they'll probably knock one up for you.
What version colour scheme of the 150s have you got? The older STR8s had a grey enamelled surface and the ST version had a medium blue enamel. The new versions have a dark blue spray job with the new Stanton fisher price logo. If you've got the old version it would be a shame to cover it up, that enamled surface is the best quality surface ever to be put on a DJ table.