More digging, haven't found a pony yet...
There is good data on Delphi Packard connectors here:
http://www.powerandsignal.com/
The print for the 12129486 is there for example (in pdf format even).
It also lists these terminals as "related parts" to the connector 12129486
12176855
15383341
12110846
12110847 < this one is on the print for the connector
12129409
12110845
12110853
These terminals are basic variations for combinations of wire gauge, insultation thickness & with/without rubber seal.
I am still working to find out if any of these are available via a source that sells to the public.
Stay tuned...
Joe J.