I don't recall seeing any kits for sale. However- I may have a feasable idea. You can pick up just about any of the used Phillipine or Turkish 1911's, then detail strip them and go back in with purchased innards.
The reason I say this, is if you ever come across a partially finished frame and slide (SARCO used to sell these) you will need a fairly well equiped machine shop to properly finish one out to spec. According to Kuhnhaussen's (sp) book, I would say with confidence that basic hand tools will not come close to getting even a 90% finished frame and/or slide up to 100%. This is way more important than it may superficially seem. For instance, if you don't have the bbl lugs properly mated to the slide with correct timing- your pistol could fire fine for 1000 rounds until the lugs shear with very little pre-warning. Also, there are snags, hangups, and boogers that can catch you way off guard. I am currently having the dickens of a time getting my extraction/ejection woes ironed out. And to be honest, this ordeal may in fact lead directly to my personal neurotic breakdown and cause such things as excessive drinking, cursing in front of womenfolk, and eating un-buttered grits!