All I can say is "now you've done it"......you have gone & started what I lovingly refer to as the "Snowball effect" The old "while I'm in there I might as well...."
Wow Im amazed that you got that thing out of there without taking off at least the bumper!
Cant help on the repro grills themselves but Gunslinger makes a nice set of metal trim. As for the silver I used Totally Auto's grille silver.
Get yourself an Eastwood catalog & order up some clear zinc, underhood black, cast blast, detail grey, zinc phosphate paints...hood latches should not be body color....touch up the pullies, paint all the bolt heads etc...that car wont be out till next spring

While you have it out, nows a good time to black out the radiator yoke....body color shouldnt be showing through the grill
fasteners are best purchased from R/T Specialties. Put the whole thing back in as a unit.....just like you took it out