Here in Oklahoma City, Cattlemen's Steakhouse has them on the menu as an appetizer.
I know it well - they're the ones who got me addicted. But, I don't live there, anymore!
Used to phone in late-night orders and send my hubby all the way across town down there to the Stockyards to pick them up. In the snow, even. On ice.
LOL, in Amarillo, we always stayed at one of those motels on the freeway (Historic Rte66, natch) as close to the Big Texan steakhouse as we could get (they even had one of their own!), so I could get my late-night lamb fry or calf fry fix! That's after having them for lunch and dinner, too!