Sent you PM. Will try to find the shop that I saw with the 5 speed Z34 in Windsor. If I can track down their name, I will call them for you.
here are some in AB. Both are 284 trans. Since these transmissions are impossible to find, I would grab the whole car just to have a spare trans. Hard to justify the freight cost though..
I am definitely not an expert, but I would go with an F23 or F40 instead. Far more common, and easier to find parts if you do break something.
With the F23, first gear is useless with a 3800SC, but you can get the gearing changed to a later model F23 FY1 code for better gearing for 3800.
search the forum, there are some threads on the gear swap by much more knowledgeable people than myself. WCF sells an F23 swap kit that seems pretty solid- I bought one recently.
Good luck!
[This message has been edited by cam-a-lot (edited 06-28-2022).]
