Welcome to the forum Mark WA, sorry to hear about your ST being damaged, I understand your pain
I have had two ST1300s damaged by grubs in Brisbane city a few years back
The first time was a drunk, I managed help the Police catch the guy and he was charged.
The second time was a street kid, he was also apprehended by Police and taken to court but they let him off
Anyway I hope you are able to get all the repairs done for a reasonable price and get back out on the road soon
Cheers
Shiney