I've never seen it in either place, nor any store that is homeowner oriented. It's pretty much a commericial thing.
You need to find a wholesale house for plumbers, or HVAC people. Something like a Grainger's or the like. Or fire protection folks. You want someone that sells to
contractors.
If you go to their site (
http://www.unistrut.com ) And click on "Contact Us" (look in the blue bar), you can look for a dealer. It's kind of a kluge, you have to click on "Locate Unistrut USA", and then take it from there. Closest factory store to you appears to be in Buffalo, which isn't likely going to do you much good. You need to find dealers.
I just searched on "Unistrut Albany" and found these folks:
http://www.eberliron.com/sales_reps.php#albany
http://www.fwwebb.com/html/ny.html
Hope that helps!