I ran 40wt. oil with gold springs. I've tried 35 and 50wt. and silver and black springs. It depends on the shock angle, but that would get you close.
If you need shocks let me know. I'm working on a line of products and the vcs shock is one of them. It has a TiCN coated shock shaft and a remachined piston to be concentric to the shaft and radiused. The complete kit goes for $16.00, but if you need 2 I'll cut you some slack