Sourcing a used one will be next to impossible. Unfortunately junk yards almost always cut cables instead of taking an extra minute to disconnect them. Also the oil pan has to come off to R&R them.
A442 transmissions. The A343 was used only in the US-Canada 95-97. The rest of the world got 442s 93-97. A LOT more vehicles.
The connection at the valve body is different. It may be possible to use a cable from another 343-equipped vehicle, Tundra, 4unner, etc) but it's going to be a...
Discontinued. The only application to use this part number is US 95-97 FZJ80 and US/CDN 96-97 LX450. That's very small population. As such there would be no reason for other world markets to stock it.