I mentioned several that work well for me - from the AF Store at www.anabolicfitness.com - NYC and Thermorexin. I really, really like both if these. The NYC revs me up more and gives me a higher body temp, but the T-Rex suppresses my appetite like crazy. I love them.
You can also make your own ECA stack with separate tabs of ephedrine, asprin, and caffiene. Do a search and you can probably find recommended dosages if you go this route.
If you want to make the EC stack (you don't need the aspirin if you're not obese), you stack 25 mg ephedrine hcl with 200 mg caffeine (most common dosage - vivarin, no-dose, etc). Take 2-3 times daily, but never after 4:00 pm...unless you like staring at the ceiling all night.