Speedo cable for P200E with Lammy forks?

Hello, I have a Vespa P200 with Lambretta forks (pic link below) and am in need of a speedo cable.  Would a standard Vespa or Lambretta cable work or would I need to get something custom?

Thanks for your time!

you need to measure to get correct length.

No you would need a custom cable made, i don't think Sip do them Beedspeed in UK used to.