Side Panel for Vespa 50 V5A1M

Hi, I have just recently picked up a Vespa 50 and I am currently restoring it. I have no documents to tell me the exact year & model at present, but I was wondering if anyone can advise  what the correct part number would be on the SIP site for a side panel for the V5A1M range? 

Sorry meant also to ask if someone can confirm if 31122000 is the correct steering lock. I have removed the lock but it is broken at the back end. The front measures 4mm but only have 26mm length but there is a bit that has broken off at some point.

 

Many thanks in advance

Veilen dank

David