Update:Whoa, just got an email from Over Drive Inc pointing to the GBP-1S outfitted VF-1J of Hikaru Ichijo. You can already view it at the Yamato-Toys website. Both Over-Drive($162.99), HobbySearch(15,960 yen) and HLJ(Y15,960 at early bird discount but will retail for Y16,800) have this on pre-order. Yamato also recently announced that they will be selling just the GBP-1S armor as a kit.
This beautiful thing will retail for Y17,640 and will be available by November 2009. I am assuming now that they will most likely sell the GBP-1S as a stand alone product. If that was the case then I'd probably make sure to reserve some cash to buy this. :D
Also, check out Bandai/Takatoku's 1/55 GBP-1S here.