try here also
http://www.starshipmodeler.biz/
i have both the MARk 7 and 2 vipers in 1/72 and have to say they are great kits
they have some 1/48 stuff coming soon not sure when
also fantastic-plastic has the pegasus in 1/900 scale i believe there will also be a 1/72 scale mk 1 coming out soon from a UK site pm me and i can shoot you all the sites i know of