I do a lot of Carters and have lots of original parts and pieces but for that particular one Jon (carb king)would be your best bet, get all the right numbers off the carb - carters are very precise about thier carbs.
The hardest thing is to get them apart, easy to rebuild after that.
If you get in a 'spot' post up a pic or two of where you are and theres' several of us on here that can give you first hand expert advice, ok?