Looking for my dad's 71 Superbee

I am planning on going to mopars in the park this year. I know a couple guys around the Sauk Centre area and I have reached out to them. No luck so far. I wish I could find the VIN somehow. I talked to the guy that bought it from my dad and we are going to go to Sauk Centre and poke around once the weather warms up and people start bringing their old cars out.