LA Super Trux have been making their 'Twister' schakles for ages.
I have a pair going on my LJ as we speak - about $200 the pair for 12" of droop
I'll have pics early Feb.
Also pics of their Super Droopers - $100 the pair for 6" of droop
Yeah, I run them on my 87 hardtop. They perform well and don't unfold on the road (provided you have shocks installed). I used a custom front shock mount from wyo (for the yj) and run a set of red-ryder shocks sized properly. I still cannot get the revolvers to open all the way though they come close. I think the problem is that my springs are not broke in (still less than 2k miles on them). Right now it ramps as well as most spring over'd zuks. Though the downside is that the cost is greater than a SPOA.
A side note: Even though the revolvers open up from 5" to 10" (i have simplified the lenghts) you really only gain about 2.5" more droop. It is just like running a longer shackle a 1" longer shackle yields 1/2" lift while a 5" longer shackle yields 2.5" lift. It is the same with droop if it unfolds from 5-10 then you only net 2.5" of extra travel not 5" more droop. Keep in mind that it is a premium price to pay for 2.5" more down travel.