Mountain Sports Outlet (MSO) is right at the Silverthorne exit. They have pretty decent prices and a good sized selection. There is also a new shop the Lumberyard in Breck that is supposed to be good. Just about any of the shops in Summit country should have sales going on for you.
Thanks Killclimbz !, I will get in touch with them both closer to the time and see what they can do.
Thanks for the advice guys, looks like I will need to buy from a selection of these since it looks like it'll be a bit more of a mission to get all the correct gear in sizes, and colours etc from the stocks available, but I have plenty of options now to approach anyway.