Here's the one time solution for your dellorto. Save yourself the hassel and expense, and just buy the full kit. Its far less money in the long run, and its great to keep on the scoot for the long rides, and different areas that require a main jet swap.
If you were to purchase each jet individually, you'd spend $40-55. This kit is the smart move.
Choose from 5mm or 6mm. 5mm is 19+, 6mm is for stock-17.5mm