If your looking for something for a fully developed Lehigh, most of whats available is in the 5" tall range. Reeves Gorings 13 and 33 are both about as early as you can get in a developed Lehigh. The 13 is off of the 1787 Niehart and Ive seen it on an unsigned Neihart that I believe could be earlier. 13 is very similar to the 33, just flatter...33 has more curve and was taken from a gun thought to be Kuntz but turned out to be Rupp or vise-versa . 33 can be straightened and filed to approximate the 13. Reeves number 14 is also a Lehigh plate but later and thinner.
Dave Keck sells one very close to a 33. Check out his web site.