That is correct, originals will have green or purple dye if they are for a vinyl top. The sizes I have found are as follows

Closed-C inside size outside size

.375 .460 .490 current repop

.420 .490 .520 some early repops

.380 .470 .505 non-vinyl originals

.430 .510 .540 vinyl originals


As you can see about .050-.060 worth of grinding and sanding on the drip rails and they will work.