any competent gunsmith or machine shop can do it. my reccomendation would be to ship it to
www.azexarms.com.
otherwise, contact neanderthal, he should have some contacts or know of some machine shop down there that can handle it.
if you do go to a machinist, take a USGI flashider with you so they have something to base their measurements off of if they end up single pointing it.
shouldnt cost you more than a $100 or so.