If you are good with electronics, Somewhere in the first posts of this thread are links to Dave's (Raleighcopter) Github, where his driver design and programming can be found.
If you are not that handy with the tiny stuff (like me) then there is user "hmeijdam" also in this thread, who makes the drivers for me. You can ask him to make one for you, but as an alternative, I will receive a batch of 10 drivers in May, and I can set you up with to your choice a driver, a partial set (driver and housing, you source the solenoid yourself) or a full set (driver, solenoid and housing).

But as said, you'll have to wait until May then, because I first have to interrupt my life for some necessary money-earning work...