There arnt too many places offering new panels.
These aftermarket panels all seem to be made in the same place in Thailand and i havnt read any reviews regarding fitment of these.
Id be enquiring with Muscle car parts about these if you live in Australia.
http://www.allmusclecarparts.com.au/web ... /1600.html
Rust replacement panels are available from a few places like APC and Nissco etc.
http://stores.ebay.com.au/Automotive-Pa ... 34.c0.m322
http://www.nissco.com.au/
You shouldnt have too many troubles with these parts.
Make a build thread in "Readers Rides" if you want. Sounds like a nice project.
68's are a unique 1600, enjoy!