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.
I viewed his u tube and it looks easy however my blazer is lowered and unsure if that would influence. Will probably buy some spacers off of Amazon, can return if not pleased, will advise.