I'm sure you have a solution but have you tried this stuff:I rarely DJ anymore Rox -- maybe once or twice a year now, so my issue is with the quality control. I use them a lot around the office in testing, and they slide without me having to put "feet" on them.
I have $29 speakers, that came with sticky "feet" to apply if needed. Again, you would've thunk they would include that for the price.

http://www.amazon.com/Duck-1211084-Non-Adhesive-10-Square-12-Inch/dp/B0027P94R6/ref=sr_1_9?ie=UTF8&qid=1303913216&sr=8-9
