I built my main pair starting probably about 78-79 and slowly upgraded them as better sounding tweeters became available. I think they still sound fine and are Gefco rubber surround 8" woofers, Realistic 1.5 dome midranges, and Philips dome tweeters. I just tried to pick speakers that matched up well level and range wise and used simple caps for the mid and tweet.
I have added a OK sub and am still happy with them to this day though they slowly got bigger starting out as 2 ways in a small box and ending up in a medium sized box as the 3 ways they are now. The boxes for the last upgrade came from Wassons Lafayete Radio here in Portland and I'm pretty sure they folded up about 20 years ago.
I have since been using a small shop that sells components and does reconing and that's where I get the things for my cars and any replacement speakers or parts needed or reconed.
JaMac is the place if anyone local wants to look them up. http://jamacspeakers.com/