I used to love that stuff myself. So easy to apply and remove. Didn't last too long but looked good.
I tried to use my 3 or 4 year old bottle a month or so ago and I thought I was going to need a chisel to remove it. My point is, even if you find some, I probably wouldn't try and use it. It's going to be at least a couple of years old.
We'll just have to move on. (I've actually found something here that I like, but it is private label for a local detail supplier.)