Hi, I am thinking of buying some Gibson replacement tuning pegs for my Epiphone Les Paul 100. I just want the standard ones that they put on the Gibson Les Pauls. My forst question is, are they compatible with my headstock. From what I can tell form the pictures off of Gibson, they look to be an exact fit. Second, does anyone have an idea how much they are and can i buy them at a retail store, or do I have to order them off of Gibson?