Technically the cop didn't see the wreck HOWEVER, he can testify to the physical evidence he SAW on scene. (point of rest, location of impact, etc). ( Why the report is not allowed is beyond me but)...
It shouldn't cost much to file in small claims court and you won't need a lawyer. Sue BOTH the driver and the INSURANCE company.. The Ins Co is who'll have the money. It'll cost them more to send someone to court to represent them (and will more than likely settle before it even gets that far)..
Some leg work NOW on your own, will help as well..
Take pictures of the intersection, damage to your bike. Make notes NOW what the other driver SAID TO YOU, EXACTLY.
If their car is still damaged and you can swing by there, snap some pictures of the damage. (Include a picture of their tag as well).
Like "Judge Judy"s court room, draw up a good pic of the intersection with both your vehicles and have your pictures to back up your sketches..
You'll need an WRITTEN estimate of damage to your bike, property, gear, etc should you prevail. If the bikes totaled, a value of that as well.