I have a gently used Taz 4 Dual extruder (2-3 trial uses). Too advanced for me…so rather let someone else have it.
On eBay, search for “TAZ 4 Dual Extruder Tool Head”. I just posted it, so may not show up for a few hours. Starting price is $249 with no reserve and I set a Buy It Now price of $350. Retail is $495 and is currently out of stock.