What to do about 5 on 4" stud pattern wheels?

On my '62 Valiant V8 conversion, I'm using the running gear I got off a Duster V8, which takes wheels having the 5 studs on a 4-inch circle. I've noticed that hardly any wheels seem to be made in this small stud pattern. Right now I'm using Wheel Vintiques Series 61 steel Rallyes, which as I recall was just about the only wheel I could find with this stud pattern.

I'm not totally thrilled with the Wheel Vintiques Rallyes. They were pretty poor on true and out-of-round, out of the box.

Is there anything I can do, that is not too expensive, that would give me a wider choice of wheels, or am I Totally Screwed and should just stick with my Wheel Vintiques?

Is anybody aware of any other types of wheels made in this stud pattern, which I should look into?

On the front, maybe I could get some different rotors with the 4-1/2" stud circle? I'm using the Kelsey-Hayes 4-piston discs.

In the back, would I have to get different axles?

I'm not really too smart about this stuff. Any suggestions would be appreciated. Thanks.