Thanks for the suggestions. I hadnt considered trying children's clothes. That just might work.
I also did find (though they're not exactly cheap) that Sporthill makes SOME of their running pants and tights in three lengths. And they have their products broken down by temperature zone. I found a few others on running warehouse.
Can I rant for a moment-- why must one always pay a premium for "specialty" sizes? Why do lines only offer a fraction of their product in those styles.
If the AVERAGE height for a woman in the US is 5'4, that means that fully half of the population must be under 5'4.
Anyway, thanks for letting me rant. I feel better.