I had springs made over 10 years ago, I can't remember exactly but might have been $1,200-$1,500 US for a trucks worth and the pins and bushings all around.

It wouldn't hurt to also check with Eaton Detroit Spring.
https://www.eatondetroitspring.com/
In my experience they did just what they said they would, nicely made springs in every detail, delivered on time, and were a pleasure to deal with.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-