Getting at Counties in PUMS

I am measuring disconnected youth (ages 16-24 neither in school nor working) in each state and working with the ACS 1-year PUMS to generate these estimates by state by year. No problem there; I can match state-level estimates reported by Measure of America http://www.measureofamerica.org/DYinteractive/ But the goal is to generate county-level estimates. 

Now if I have read the documentation correctly, PUMAs are the smallest geography I can get at with the PUMS. This is probably why Measure of America relied on  "custom tabulations provided by special arrangement with the US Census Bureau" to generate their county estimates of disengaged youth.  

What would requesting custom tabulations such as this entail? I imagine there is a fee and a process to request such a tabulation. Has anyone had any experience with such requests and if yes, would be willing to share the essential steps? I suppose I am really looking for someone to tell me it can't be done without a hefty fee but do lie to me :)

thanks!!

Ani