RapidRobert, can send you a message (mailbox is full) so i'll post it!
i was looking at new fuseblocks on this site today and ran across this - http://www.painlesswiring.com/webcatalog/largeview.php?SearchField=10127&SearchAll=Classic Cars
it seems complete from end to end and the price is about the same as you were going to pay for just an underdash set. i know it's not as simple as a repro but it might be worth it to you to check out