These guys are the real deal but their marketing leaves a lot to be desired as they don't have a proper website and don't come up well on a Google search. That said, message them on Facebook and expect to get a quick response. They have by far, Bali's best selection of golf clubs and gear at reasonable prices for the island. I just bought an awesome putter there recently. Golf and Golf gear is not cheap in Bali so stock up before visiting but if you didn't go check out Bagus Golf. It's close to Bali National course and not too far from New Kuta Golf Course and Bukit Pandawa Golf Course. I believe you can rent Japanese golf clubs here as a cheaper alternative than renting at the courses which can be shamelessly overpriced.
No website but check their Facebook page here
Address : jl.bypass ngurah rai no 909 nusa dua, Benoa, Kuta Sel., Badung regency, Bali
Phone : 0821-4444-6500