Build your own for about $30.00
http://www.amazon.com/AC-Infinity-HS1238A-X-Standard-Cooling/dp/B009OWRMZ6
Lap board was one I received a few years ago for Christmas and I repurposed it. It has a nonslip material on the back that I left there and just cut a hole in it. Even has a handle. The cup holder works for holding bits, may put a magnet behind it and that would keep them from rolling out. Pen holder may be nice too.
Switch Lowes $6.00
Dust Bag, Lowes $8.00 in store.
http://www.lowes.com/pd_98705-20097-9011511_0__?productId=1115433&Ntt=shopvac&pl=1¤tURL=%3FNtt%3Dshopvac%26page%3D2&facetInfo=
Took me about 30 minutes to cut the hole and assy.
Works real well, fan draws 1250 cfm, bag works well to. It has a strong rubber band and fits nicely over the fan housing.
Real pleased with the results.
Total $31.00