Please tell me you were kidding. If not, you just made every estimator in the world S-list. People try this on me constantly. I WILL NEVER give an over the phone ballpark guesstimate, etc, whatever you want to call it. If I can't look at a set of drawings or do a site visit, forget it, you get the T&M treatment.
Now, as far as the OP goes, sounds like you have a pretty good idea what material is need. Assemble your material costs, plus labor costs, add a reasonable mark-up, permit fees, overhead, appropriate taxes, total it up and you will have your quote.