Fitting a lambretta rear carrier to a largeframe P series vespa

Hello!

I have heard that this rear carrier for lambretta (http://www.sip-scootershop.com/EN/Products/Luggage+Carrier+rear+CUPPINI+_25037300) can be modified to fit on a largeframe Vespa/P series scooter.

 

Here's a photo: http://members.modernvespa.net/teo_korea/uploads/2_421.jpg

 

I was told this was possible because a bracket attachment is available for P series scooters, however I'm not sure where to find that, or even if that is accurate information.

 

If anyone has any knowledge on this subject, would you mind helping me determine if this is possible?

 

Thanks!!