You can get it almost anywhere. The two most know brands are Vasopro and Bolt. Both are around $10 a bottle. You can get it here:
http://bodybuilding.com/store/mp/vaso.html
Normally you would stack one dose of lipo 6 (2 caps) and 1 vasopro pill which is 25 mg. With these two you should see great results.
I would reccomend starting with one dose a day for a week then bumping it up to twice a day after that and do a 4 or 5 week cycle of it.
-Kevin