I have 14x6 Rally I on my 67 LeMans, had no problems getting tires from Diamondback. I went with 225/70/14 Cooper brand red lines. When I bought mine two years ago now I had my choice of three brands and went with the Cooper brand because they were the cheapest of the three AND had the longest mileage warranty (longer than the BFG). Also at the time, Cooper tires were still made here in the US. Not sure if that is still true or not.

They have been on my car now for 2 years, I've put 25k miles on them and they look brand new. They are radials and ride and handle perfectly.

Delivered to the house the four of them were somewhere around $750. The red line is solid all the way through and does not nor will not come off and the outer face of the tire is shaved smooth and clean. They look great!