I looked into this not too long ago. Here is what I found. I have not contacted any of these yet.
There are many types of homogenizers - inline shear mixers ($5000 - $10,000), microfluidizers ($50,000 - $200,000), high pressure homogenizers ($100,000 - $500,000+).
For commercial applications, the vendors of the equipment will be able to tell you exactly what their equipment can and cannot do for your specific recipe(s).
This link has the theory and how it works: http://www.foodsci.uoguelph.ca/dairyedu/homogenization.html
Shear mixer: http://www.silverson.com/USA/Products/inlinemixers.cfm
Microfluidizer: www.microfluidscorp.com used to work, but it seems to be an inactive link now.
High Pressure Homogenizer: http://www.gowcb.com/products/disperse/homogen.asp
Let us know what you discover.
Todd