Digital BW, The Print

Does anyone know of anywhere that accepts Epson inkjet carts for  
recycling? I have amassed quite a collection of spent carts from my  
R2400. I used to take them to Staples and get $3 each for them but  
Staples excluded Epson carts from their recycling program last year.  
I would HATE to just throw 35+ carts with chips in to the garbage. I  
would even be willing to pay shipping  to a recycling center. A web /  
Google search has come up empty.

I'm in the US.

Any ideas?

-Jeff