Thanks guys.
Like I said yesterday, the car's taken on it's own vibe here, so I gotta follow through.
Used the plastic as a bending template for the solder.
I like the solder for initial shaping, it's very compliant & forgiving in free-hand shaping, yet strong enough to hold it's shape for fitting & mock-up.
I'll shape a bending jig, off of the solder pattern, out of some plywood for the aluminum.
Actual axle will be in probably 1/4" material which will scale up to 2".
And put it under this, on a similar set of coil overs, as what's going on the back of the car.