Seriously ? He can get all parts for the ZX-S ?? If so then post the name of the shop and contact details !!
But are you sure he dosent mean the Lazer ZXS ( Sport ) ? You can still get nearly all the ZX/ZXR/ZXSport parts so it may be those he can get hold of ? The Sport was a watered-down ZXR and Ive got a NIB one up in the loft, very basic buggies though.
If they ARE genuine ZX-S parts you can get, let us know !