looking into this a hair.
It appears that you can get a blank key and using the master key program it using a pedal dance of sorts.
Most info here is for 98+ toyotas, i make no guarentees because im looking for my 98 xle
Summit racing has a blank key
http://store.summitracing.com/defaul...t=JBS-TOY43AT4
for cheap but im not sure about how it gets cut etc
I found this guy
https://www.lexuskeys.info/index.php
off lexus club (earlier post) it appears to be one of the more informed web
he asks for 45 for a cut key, which you then have to program yourself.
I have the pedal dance of sorts and can post it if anyone wants it
looking for any people who have done this/know anything about it