Rocklizard has stopped production for personal reasons - he's only doing the last few of those which are back-ordered.
Of the remainder, CRDSTU in Aus is proposing to make one, although I don't know how far along he is on the project, or even if he's started it yet - it was 4 or 5 on a list. You'll need to search this site for more info.
There is a steel one from SA, look at
www.gomad4x4.co.za, and a chap called Boiler in the US is doing a very nice one in aluminium (or aluminum as they say) - look at his thread on LOST -
http://www.lostjeeps.com/forum/phpBB...hp?f=1&t=51289
He's a mechanical engineer by profession, and has done a very good job in designing it. He's done a couple of prototypes and is refining the design to make construction easier (and therby keep the cost down).