They can be rechromed, but believe it will be costly. I have a lot of sets from the 49 parts cars I have pulled in but most are average with the typical small pitting you see between the grates. I have a few that are closer to VG, a little better than yours but need to take a hard look at what I have. I do have a very pristine set I have been holding for a long time and have been debating if I wanted to use those on my 64 CDV or send a set out for new chrome. Either way, they can be rechromed but will be expensive. I would probably sell my pristine set for $150. I also sell the good to VG grills for $25 each or $50 for a set. Perhaps Russ or someone else has more pristine examples but I just don't see many in that condition on our humid East Coast. As far as new chrome I would make a wild guess at about $300 to $350. Perhaps someone has sent in a set and can let us know what they paid.
A good set on Ebay would probably cost that much Jason. Since it's such a prominent piece 300 wouldn't be that bad if the rest of the car is near perfect.
email me and I'll see what I have. If I have a good set, 75.00