http://www.ebay.co.uk/itm/161878439504?ru=http://www.ebay.co.uk/sch/i.html?_from=R40&_sacat=0&_nkw=161878439504&_rdc=1&clk_rvr_id=938082885739&rmvSB=true
Although buy at your own risk as found these comments on another forum:
Well, the one this person got doesn't look good. this is a c/p of what they said about the RBA for Nautilus:
Ok, here it is....
1. Will NOT fit in the Kabuki, the bottom piece ( the piece on the right) with the airholes, is too long. I even pushed the screw up a little, and still to long. Did not want to risk stripping the threads on the Kabuki.
2. Tried it on the Nautilus mini tank, will not fit flush. I did not want to force it and strip the threading. The bottom piece mentioned above, is to long for this mini as well.
3. This is a .... to coil. Already stripped one of the tiny screws. (and I have small girly hands)
4. Will it fire yes, .9ohm.
5. Can it be used with Nautilus products.... NO
doesn't fit properly
6. What to do when you receive yours.... throw that P.O.S. in the garbage, and go drink a beer.
7. Can the concept be improved upon by a knowledgeable Modder and Kabuki Maker....yes.
8. And finally...What to do when you receive yours.... throw that P.O.S. in the garbage, and go drink a beer.