The only Matchbox you will currently find in stores is a GTS-R and the only Hot Wheels is the Treasure Hunt coupe.
If you are OK with a different brand, I recommend Maisto. They have been making the same blue GTS & white GT2 for years. These are the ones you will find at Walgreens individually carded on red cards. You can also currently find the 2 vipers pictured below at Wal-Mart however they will be in 2-packs for $1.50ish or 5-packs for more.
Your best bet (in terms of price and quantity) is Dollar General or Family Dollar. They only cost 50 cents each and there are 3 in each box that the store gets if you are lucky enough to find one that hasn't been routed through.
The white GT2 has a spoiler on the back, but is otherwise pretty close for the price.
