Same here living in Iowa, gets aggravating when you can't drive what you want all year round without salt dissolving it to nothing. I'm grateful that this year has been very mild unlike past years, but the constant "oh it's gonna warm up and it's gonna rain to wash the salt away!" to "oh boy...
I thought I recognized your Suburban on Amazon, lol, glad they finally have those headlights back in stock, I was a bit worried they wouldn't be back in stock so soon when they sold out of them on the trial run.
Here's a decent list of some of them: http://1990suburban.com/conversion_packages/chevy_suburban_conversion_packages.cfm
Not sure if that website's up anymore, doesn't seem to work for me.
As long as the axle is from a 4x4, it'll bolt in, 2wd axles are narrower by a couple inches. You'll need a conversion u-joint since the 10 bolts use a different one, don't remember the one right off hand.