pompanolynn,
Welcome to the club!
You are going to have to do the same as everyone else who buys a first generation TBird, search the flea markets around the country, and watch eBay for one. And be prepared to pay top dollar.
My small bird came with its original jack, but several others purchased from the same restoration shop did not. I recall one of the new owners describing how much the originals were going for online, and bemoaning the high dollars being asked. That was about 8 years ago, and I don't think it'll be any better today.
Good luck in your search, and here's hoping you find what you need.