I haven't thought about spacers, but I was thinking about rims with a 1 to 1.5 inch negative offset.
If you do the spacers, let us know how it goes and how it performs. (should be a bit cheaper than custom rims)
There is a member that has done spacers and posted the install video on this forum. Just do a search for it. The guy's Youtube channel is The Snyds and he has done a few mods to his Blazer and shows the installs on all of them. Run a search here for spacers, or Snyd, and you'll find his vid.