To get an idea, the kit is this. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-YIrug5tMv9k.html The kit costs a lot, but in my opinion it will retain a fair historical interest. You have the possibility to keep the original mechanics of the vehicle. Here in Italy Zirri is known as one of the best Vespa tuner. Maybe the kit costs around 4000Euro, you should ask.