That's a good idea too. My thinking was to get some 2x4 steel tubing and use a hole saw. I saw some on summitracing.com that weren't too bad. For $21 it looks like it may be worth it to just purchase the perches. (had to say it)
Plus, they are "chevy type", which as ... Ugh. I just realized that the diameter of the axle housing may be different, which would'nt do me any good.

http://store.summitracing.com/partd...=700+4294841030+115&autoview=sku