Not sure if they're scarce, but there are two hanging on the pegs at my local Wally. They've been there for about 2 months. I just let them sit, as I feel they're ugly as sin.
However..they're made in a different plant than the regular HotWheels line, and have a nice heavy base.
Iam told they are only found at walmart stores. I have been looking and have other people look for me also nothing. Ugly or not if they are grand nationals people are collecting them...