The parts are the least of your worries. Plenty of online retailers who sell for a good price. Your problem will be sorting out which to get. Obviously fit is a concern, also you must consider specs. Are the tweeters blown? You going to re-foam the woofers?

Funny, I was at a buddy's last night. He just refoamed and old pair of Sound Dynamics. These things are monsters. 2 - 12's and 1 - 6!!!

I am not a pro at speaker DIY. Try these guys:

harley .guy07
theebadone
kexodusc

they can point you in the right direction, try a nicely worded PM....