The only place I've seen that rebuilds ABS for the Q is
http://www.cardone.comBut they require a core, prior to rebuild. I'm looking around for a core right now.
If I can find one, soon, I'll send the core off to be rebuilt and then "donate" my old one as a core for the next NICO user, providing that the receipiant continue the chain. I reserve the right to forget about it, if my atty thinks liablity is too great.
Mine started leaking a few months ago, but I'm not even close to filling it up every 150-200 miles, more like topping off every 1500 miles.
The seals in these units fail for two reasons, age and lack of routine fluid changes. If you are really loosing that much fluid, be careful, sounds like a bad day just waiting to happen.