silentblock engine/sock absorver PK XL 125 Elestart

My Vespa has an rubber (silentblock) engine/sock absorver (code 112204), this rubber has 47mm long and i do not find this rubber, only i see with 31mm long like this

Someone has found this rubber for Vespa PK XL 125?

The answer is easy:
This item is the right one.

The length describes the part in its unassembled condition.

When you force it in it's place, and you also attach the inner sleeve, the rubber will be squeezed and therefore expands a bit.

No problem. You've already found the part you need.