That specific item is called dominator headlights with the characteristic bug eye style.
You will find a lot of variations if you search the above phrase in ebay, amazon etc.
Edit: Didn't see at first, that specific Kit above includes extra brackets to mount original FZS600 Speedo. Neat touch if you wanted to retain the bulky 1990's Analog dials.
A lot of the Dominator headlight kits are just the 2 light units with fork mounting brackets. Universal fit.
You will find a lot of variations if you search the above phrase in ebay, amazon etc.
Edit: Didn't see at first, that specific Kit above includes extra brackets to mount original FZS600 Speedo. Neat touch if you wanted to retain the bulky 1990's Analog dials.
A lot of the Dominator headlight kits are just the 2 light units with fork mounting brackets. Universal fit.