u-bolts?

[vectorit]

Best plan I think is to find a shop that does spring work for big rigs.

They will make them to your specs pretty much while you wait, at least that's the experience I had when I had my suspension worked on at shop that specialized in servicing heavy duty trucks.

I've also read quite a few posts in the past, that people in your situation have searched out a shop like that and have had positive experiences.