Yep, Karl has been very helpful with this Techstream stuff.
I don't know the history of my injectors either. Although I have Toyota service history with mine there is no mention of injectors/seals being changed.
Having said that, someone on here some time ago, gave a link whereby you could put in your vin number, and it would tell you if yours was affected/done. Mine wasn't on that list, but I have no idea why, and why some are, some not. As I understand it, the original problem was the seals/washers which should be changed from copper to aluminium to stop diesel leaking into the sump. Dont understand that either, as copper was always for washers on injectors in years past.
Toyota paid for some engines that blew, but not others.
There was no recall as such, as VOSA wasn't involved with a safety issue, it seemed to be some sort of random thing between Mr T and customers.