I recieved this from Old Air Products after inquiring about the same thing last week. They quoted a reasonable price for a rebuild and would apply the correct markings when complete. I would assume that you could order a new decal with your date code etc applied to it if you requested. Try shooting them an email and let us know what they say.
From: Clint Millican clint.m@oldairproducts.com
Yes, we can do a special rebuild and keep the original stickers and date code markings. Cost is $245.00, allow 2-5 weeks turn around time.