I think most of the patridge sighted guns were the first few years. If you plan on shooting distinguished with it and you want to be able to use a neckhold at 50yds you will have to have a taller front and rear sight installed anyway.
So if you find a good one just take it to a smith and have them mill it for the taller front.Check somne of the PPC forums someone may have one for sale. I will check around for you. Good Luck ,Bob