Green is Blue in the USA, there is really no difference between the two other than the logo screen and label.
Ehh, not exactly. Big differences is Green has different front sprites for each Pokemon (different than both the international versions of Red & Blue) and a remixed Cerulean cave. There are also some differences in battle animations for moves such as Thunderbolt.
I unfortunately don't know of anyone who is doing repros based on the translation
EDIT: You could do what i did. I just bought a second copy of Pocket Monsters Green and retrofitted a new shell to it similar to how the NTSC-U releases were. Sorry for the fuzzy pictures its old. I've played pokemon so much that i don't need to read anything so its still VERY playable.

Here is a little side project i decided to finally finish with my spare copy of "Pocket Monsters Green" 
