The Colt Custom Shop has been offering a "1911", which appears to be just that externally at least, but with Series 70 innards. (
http://www.coltsmfg.com/cmci/1911WWI.asp).
I have seen one, and you sort of do a double take. First you see a 1911 in impossibly good condition, but then you notice a strange texture to the finish that isn't what you have ever seen on an original from the period. This is because all of Colt's horses and all of Colt's men can't (or won't) exactly duplicate the fine fit and finish of those old guns.
Most Wild Bunch shooters seem to be going with the inexpensive "plain Jane" 1911A1s that are coming from overseas right now. All are generally acceptable.
H