that is weak, I really hope you find who did it. I got paranoid about mine so I put up a webcam, I don't know if you can see the parking spot from your window, in my case I can. using a cheap logitech quickcam ( i upgraded to the pro version, but it doesn't matter) and
catspy (freeware) it will do a motion capture and capture prior to the motion activation. I put it up when I had a hit and run incident on my last car, if I had it up before the incident I could have saved me the collision deductible and it could only have been the uninsured/underinsured deductible. When you have the $$$ you can get a better camera for higher quality/nightvision.
so all you need is a computer (which you have)
a webcam ( nothing too fancy )
and the catspy software (documentation sucks but it is easy to use)
and if you don't like it there are other choices but the freeware works for me. If you need help getting it to work let me know I'll be happy to help. And once you get it in place make sure your neighbors know it is in place. The jackass who did this is probably local to you and knew where and when to hit you.
If you don't have line of sight from a window, you can put a wireless cam in your car and have it go back to your pc, but that is a lot more work and I will go into it if there is interest.