best way to hold down thin stock on cnc mill

I am wondering what is the best way to hold down thin stock like .125 or so on a mill. I have a 14 by 7.5 window and with big clamps I can bring that unfortunately down to 11.5 by 7 very easily and I want to keep my window so I can use every inch of my stock.

Is there anything on the market inexpensive to hep me out here. In the past at job we used double back sticky tape. That was somewhat messy and I had to use acetone and other chemicals to get up the tape from machine and part itself...