Been reading this thread for a while now... Where exactly does it say that the X11 isn't supported? Havent seen any discontinued badges across it myself.
ALL spares, kits and parts are kept in stock, majority of X10 parts are all also in stock.
Development of the X11 was never dropped, all sorts were tried, to name a few wider hinge pin blocks, lengthened rear links, different front and rear roll centers, shortened rear wishbones, different hub pick up points, the upright rear shocks.
But its always been at its best exactly how it comes out the box, so yes there potentially could of been an updated kit but it would of been no better than the X11 currently is.
Problems with ordering from the Team Xtreme website are now a issue of the past, all orders are dispatched mostly same day if not the next. You should now even receive a email notification now once your order has been dispatched
If your looking for set up help have a look over on
http://www.teamnoidea.com, Martin is always posting his latest findings and set up pages over there.