FJ80 had them. Very rare. They were sold in the US until 1997. But it's really hard to find them in Manual. Earlier years '91 and '92 had more than later years.
It's possible to retrofit a Manual. But it takes a lot of time and money to do so.
Most have actually come to accept the Automatic and honestly it's easier to wheel in something as large as that.
If you're determined to swap out the Manual, get a Diesel too while your at it lol.
http://en.wikipedia.org/wiki/Land_cruiser#80_Series
www.ih8mud.com
Ih8mud.com is an excellent all Landcruiser Forum. They are much nicer to Newbies than Pirate4x4 is. Plus it's all Landcruiser.
Good luck!