I'm in the process of building the Proac Response 2.5 clones and need a source for high quality spikes and binding posts. I've looked at Parts Express and Madisound and don't see what I want. The spikes must be able to convert to rounded feet for the purpose of hardwood floors. The binding posts must be gold plated and be able to fit a 1.5" thick panel. I am 'not' looking for binding post cups. I want single posts that can be positioned as far apart as I want. Where do the high-end manufacturers source their parts? Thanks for your help.