Modern Vespa

Hi can anyone help me plz I'm from the UK and I'm re buliding my daughter her very first bike which is a vespa et4 pre leader engine I.
I have found a issue that I cant seem to slove
I snapped the banjo bolt on the oil cooler . So I've Web searched and she that its a M10 and I brought one of these but it's not right its too big (thick/fat) and now I don't know how to locate the right one can any one help me with the actual size I should be looking for as its not a m10 and I need this banjo bolt for the oil cooler not the brake . So would be so greatful if anyone can tell me the size I need to look for and also where I can purchest them in the UK maybe they labeled doffernt in UK I don't know but someone please advise thank you..... ps I've since found our this banjo bolt has a 6 thread and 3mm grip tip and I think it's the size of a m8 x.1.0 or a m8 x 0.75 ... can anyone offer some knowledge on this issue I'm having please

Moved from the forum that discusses Wiki articles...

The part number for the bolt is 436948

Where would I purchest that from as that item number could be anywhere but thank you for writing

This is the part number, and the interwebs search from the USA says large EU dealer.

Maybe start here?

https://www.motorcyclespareparts.eu/en/piaggio-parts/436948

That says its a screw but mine is a banjo bolt so has to have the hole in that thank you for your help and time

Screw/Bolt, whatever, don't forget the original list was in Italian...

And how do you know that one hasn't got the necessary hole(s)?

It is the same thing

Boom. In the package with the part number and everything!

I bet I know someone looking for one in the UK who you can sell it to..

Yes that looks the same the person that put that part up in a bag that says 436948 on it where do I get that from that exact one u have shown ? And again thank you everyone to has had the time to help me thank you

You can purchase it through a piaggio dealer near you or on line.