Vintage T-Shirt Forum & Community Authentication Appraisals

I’m looking for the yellow colt 45 drunk horse shirt that Jeff Spicoli wears in the ending scene of fast times at ridgemont high but I don’t want a reprint I want an original in a size medium if anyone can find any please let me know

We did an entire piece on the shirts in this movie:

https://www.defunkd.com/tees-of-fast-times/

I've only ever seen repros. I wonder if that was exclusive to the film.