Dang, this is a hard part to source. I spent about 30 minutes searching for this part and cannot find any vendor or second hand re-seller with this part.
No longer in stock at these two vendors
https://www.pinballspareparts.com.au/parts-by-machine/bally-parts/a-16326.html
http://www.actionpinball.com/parts.php?item=A-16326#
Good luck in your search and hopefully someone has one and will reach out to you. TZ's were rarely parted out so you have your work cut out for you. I would also have recommended Kerry Stair, but I see that you have already reached out to him.
Gord