Welcome to the board and I also wish you luck.
They are out there and are quite easy to find for how rare they are. You'd have to budget for $15K+ for a solid Barracuda (BH) and around $20-$30K for a solid 'Cuda (BS). I just found mine after about 6 weeks of searching, paid a little more than I wanted but only paid this to get a 100% complete and solid car. Keep that in mind, if you buy a rolling chassis with grille, hood and other parts missing you'll be looking at spending a pretty penny collecting these parts.
Best of luck.