David!
Thanks for telling us what you want the info. for- Now maybe we can help

I believe what you really want is more than just "dimensions" which could be identical or very close between two very different sails, you really want to know what differences there are in the SHAPE (ie "cut") between the two sails. You're in FL, right? I would suggest you transport your boat and sail to Gulfport and meet up with the Taipan/F 16 sailors there and actually compare your spi to some of theirs (I believe they have both Goodalls and Smyth's there). Alternatively you could just send the spi to a "current" spi maker and let them "recut" but I don't know what the cost would be.
Kirt