Theres the phil wood philcentric. the Exzentriker from Trickstuff, might be others.
That being said, I have no experience with them, and have no idea if they're compatible. I am assuming that frame uses a 68mm english threaded BB, so I googled "eccentric BB 68mm english" and these came up.
They look pretty damn pricey.
Another alternative would be to build up a rear wheel using the White Industries ENO eccentric hub. might be a cheaper alternative. Theres one on ebay right now for 120, lace it to something cheap, with some fairly inexpensive spokes/nipples, and it will be less than 200.