The best place to try is 'Mike' at salzo1@aol.com If your lucky you will be able to get the V3(Version 3) XWing. Other than that try the boards for sale section. This is a relatively new site so will take a while to accummulate this sort of stuff.
Right now we're all working on projects that take a lot of time,but soon - I'll be offering my own version of the SS X-wing,as are a couple of other memebers here on this forum. No one is offering casting of these at this time,as the weather makes it almost impossible to get a good cast without humidity,and tempurature wrecking it.
Mike's also not offering these at this time for the same reason,that - and he's considering only offering partial kit versions of these because of the likelyhood of sagging resin wings. Many people are choosing to make their own acrylic wings for these kits anyway. From what I've heard he's probably not going to offer these again for reasons of recasters ripping off the new V.3 design like they already have the CC,the Salzo V.1,and V.2 versions. At last I heard,he's undecided,but contact him directly to see what he's planning if you want the latest news on any of his projects.
Our very own now banned - Mike Tait. This is modelrealms on starshipmodeler.com - the old version of our site studioscale.com - RI.com,and multiple member names on SWP.com. He's recasting the TIE defender,and the Salzo kits. He sometimes calls him self Dan Tait - his mail order wife whos' real name is Dan Xiou - Warren Tait,and last but not least,Alex Deveraux. From what I've heard,he'll take anything you have,and throw it in rubber one night,and have it recast the next one!