As for the authentic vintage cherry red thick walled double shots, I've only ever seen them one place and that was from Awry here on GH. I never even knew they made them. I thought the red Esc phenomenon was a much more recent thing but Cherry definitely made them back in the day. I was fortunate enough to get one from Awry. Wish I knew about them when he first posted, I'd have bought them all.
I have some double shot red Esc keys that are the signature style. I'm sure others do as well.