why not have a custom main leaf made? There is a old timer in Ballard, Craig Auto Spring. He should be able to get you sorted.
Yea i heard of them last night, still a little far away to go on a work day, i was hoping to come up with something more local, i already dug through my shop and was only able to come up with a 28 essex spring for top leaves
POSIES does offer the Rolled and Tapered 33 1/2" Spring # 1009RT Looks like an original spring. They have a "hidden" button under the leaves which you can remove or leave in.
I can save you a quarter. I needed a spring several months ago and called Posies. They will not sell main leaves. Bill