Here are two, but remember the back spacing can be an issue with the 4 piston caliper clearance................................
http://www.summitracing.com/parts/wvi-66-7806042/overview/
http://www.summitracing.com/parts/wvi-12-7706042/overview/
IF you go with H3 front brakes AND the Silverado rear axle, you can pretty much use any wheels that will fit an H3 and it would work nicely. My favorites (and I may yet order a set when I have more money) are the Black Rock series 937, designed for the H3 from the get go.
http://www.summitracing.com/parts/brw-937786050/overview/
http://www.summitracing.com/parts/wvi-66-7806042/overview/
http://www.summitracing.com/parts/wvi-12-7706042/overview/
IF you go with H3 front brakes AND the Silverado rear axle, you can pretty much use any wheels that will fit an H3 and it would work nicely. My favorites (and I may yet order a set when I have more money) are the Black Rock series 937, designed for the H3 from the get go.
http://www.summitracing.com/parts/brw-937786050/overview/

Only problem is I have 15" wheels and don't think I can swing another set just to do the brakes lol.
So did you have to relocate the spring perches and the shock mounts or just the perches like you mentioned earlier? My axle is a coil setup since the donor Yukon has the air ride suspension so it’s going to take a little more work to make mine work. The good news is I found a local shop that’ll strip all the existing perches and mounts and weld on new ones in the older axle’s location for only $150.