1972 Dodge Colt
I would just make a tubular control arm, used to make tubular uppers/lowers all the time back when I was racing dirt latemodels...
Just make a jig off of your existing parts. Then make sleeves/bushings and bolt them into the jig, then connect the dots with tubing.
Here's a pic of the tubular replacements I made for my current street/strip car, compared to the stock parts they replaced...
I hit a pothole hiding in the shadows a couple summers ago on a mountain pass at highway speed. Hit hard enough that I thought my cell phone flew out the window, also broke some belts in a front tire. No damage to the above fabricated parts, they are still on the car.
Grant