Make that a10" or 12" DISC sander if you want the butt end flat to apply a pad. If I was looking to have a stock shortened and new pad installed I'd check with several 'smiths in my immediate area. Don't just price, look at some examples of their work, if possible. Asking on an interdnet forum for 'pricing' will get nothing but wild swings in both directions and answers to questions you didn't ask. Different parts of the country have different pricing levels. Trimming the stock off to length, sanding it flat and fitting a new premium pad is about an hours worth of work plus the cost of the new pad.