I looked at this a while back and as far as I know – which isn't very far at all, about the end of this sofa in fact – there's no DT Swiss adapter available.
I guess if you're very fortunate and have a 20mm-compatible hub, then the Hope Pro 2 Maverick fork adapter might fit, maybe with some modification. It's a two-piece, screw-together thing with 20mm body and 24mm ends. I guess it might just fit, but I've never tried it and you'd need to be careful to make sure it was safe if it did, I guess.
Or if you don't have a wheel already, build one on a Pro 2, a Maverick hub (theoretically more torsionally strong) or a Chris King. Or Bontrager, I think, does at least one wheelset with a Maverick-compatible front hub?
