Smith Bros can make them to your design. Theirs are a bit of a choir to get in but they are rigid and that is a bonus and in your case essential. Much better parts than the SE current issues 18404-08, and not to hard to deal with without taking rockers apart and easy to adjust when used with EVO lower tubes.
I respectfully disagree about the aluminum rods. Have had three sets of them bend with no interference in the motor when used with stout 180# springs.