There is a cooperative roaster opening in Red Hook, where you can rent time, but I doubt it would be economical.
It's unlikely you're going to have any luck with the big roasters. Some of these places blow through 2 pounds just testing the roast, so it's not worth their time. It would take a lot of going door to door to find someone willing to do you a favor. One place that has the equipment to do it quickly is Roasting Plant, but again, no idea if they would.
You might be better off enlisting a friend with a kitchen, a popcorn roaster, and a fan. I think you can even roast very small batches in a frying pan, and there are tutorials online.