Oh there might be someone who would do this for you, but you wouldn't want to pay for it.
Think about the shipping of your brass... gonna cost you $15 to send a flat rate box containing a volume of spent brass worth the trouble... Then at least double that to get it back. Now you are at $45 per 1000 rounds in shipping.
Brass is worth around $2 per pound as scrap. The business model works well for someone who is in the business of selling you ammo and getting you to ship brass to them at your expense.
If you really are insistent on trying this, suggest you check out Freedom Munitions at
http://www.freedommunitions.com/About-Us-s/1820.htm. I have no relation to them and have done no business with them, just offered as an example.
I would suggest you try to buy ammo in bulk, shipped to your location of choice and not try to deal with the headache of returning brass. IE try
http://ammoseek.com/ Again, I have not dealt with this vendor.... YMMV
YMMV a lot, as always.