If you haven't already bought the castings (I assume you are talking about a Silar lock Lock Kit) you would be better off to pay the few bucks more and buy a finished lock.
I have built these lock kits before and they turned out fine, but if I were to charge you for the time envolved in filing, sanding, fitting, tapping etc, my time alone would cost you more than the whole finished lock from someone who is set up to do this kind of work.
If you already have the castings, I will have to say, sorry, but at the moment, I don't have enought time to work on your lock.