I've had this one for a while now. I replaced it with a Turbo Rat which has been modded (internal trim pot and blend circuit). This was a tough one to beat for a few years for me though after the mods were done. All the mods are the typical replacements you can find on TB or doing Google searches. They made a HUGE difference over the stock sounds.
Anyway here it is.
$60 shipped CONUS