All,
I think I've found the answer - seems that although the plate doesn't have zeroes after the dash, the model number is actually 410581-0011. This would make it a TB0306 off a '81-'87 280/300ZX.
Some details on the parts numbers here:
http://jhdiesel.com/gt-nissan/
https://www.soonparts.com/news/2019/03/25/turbo-for-garrett-nissan/
And a similar looking turbo noted here:
https://www.ebay.com/itm/Garrett-TB0306-Turbocharger-Fits-1981-1987-Nissan-T3-300ZX-Engine-1442-P9002X-/254788678557
If anyone has thoughts on these units (e.g. how reliable they are, known issues, etc.) that would be much appreciated. I was looking to use this on a MK2 Ford Escort - either with the native engine or using a Zetec/Duratec.