A guy named Ron Tarr did my work for me. He lives in Morris County and also travels to the many local tournaments in Hudson, Bergen and Morris Counties.
I had him do my tips many times and he also converted a shaft to a phenolic tip/ferrule for me that has worked perfectly for years. I highly recommend him. He builds cues, repairs, etc... I've never had anything extensive done so I can't speak first hand, but his custom cues hit nicely.
I'm not sure of this is still his info, but this is what I dug up on him.
Ron Tarr Cue Repair
Ron Tarr is the man. He's a knowledgeable, honest, and very capable repair person and I'm proud to know him and call him a friend. BTW, I do cue repairs, mostly tips and shaft reconditioning but I let Ron handle the stuff I just don't want to deal with, and I've never been let down.