Hi Mate I have used the cheaper copies and all is good.
They are marked in different positions but other than that they fit perfect. I got mine from Motorcycle Spares Warehouse part numbers for some are below.
1x Keihin Type N424-21 Pilot Jet 28mm - Pilot Jet #40
1x Keihin Type N424-21 Pilot Jet 28mm - Pilot Jet #45
1x Keihin Type Main Jet - Large Hex - hex Main Jet #172
1x Keihin Type Main Jet - Large Hex - Hex Main Jet #178
I also got the Suzuki needle NEDW from Mick Hone Motorcycles.
Cheers.