Is there a cheaper alternative to this:

Probably not if you want the speakers to sound like they were designed to be. 

Kind of.  Butcher Block acoustics makes solid wood bases with threaded inserts.  Those threads can be adjusted and in some cases swapped for IsoAcoustics footers. Check the thread size.

Butcher block looks to be at least double the price.  I'm looking for cheaper. but thanks anyways.