as far as the clubs tour players use they are not any different than what you can buy.the only difference is our wedges and putters.
I guess that it's only a small percentage of the topplayers that get to play prototype irons and drivers, and it's a even smaller percentage that'll have special irons and shafts made to their preferences (ie. Tiger).
i use to grind my own stuff,but there is no need to anymore.i play mizzuno mp33 and they all look the same.plus if they get stolen or lost by the airlines they are harder to replace.that is why i don't mess with it anymore.like i said the wedges and putters are what 97%of the players have made special.tiger plays stock clubs as well.his wedges are just stock,hate to bust your bubble on that one