Model 57, you have strayed into the Australian section of the Forum, welcome.
Here in OZ the Insurance industry is proabably much like in the US. Some good, some very bad, some competitive, some outrageously expensive and most very selective of their clientele (heaven help you if you are under 25, have previous claims, have traffic convictions or want any mods on your car).
bezita mentioned Just Cars. They are young driver friendly and will insure modified cars, at a price. We don't have Hartford here in OZ.
Some companies have their own repair shops, use secondhand parts or non OEM (cheap Asian) parts and frequently spend more time investigating the background of their client in the event of a claim to see if they can get out of paying. So quite a minefield.