Quick release bumper attachment

I’m looking for advice regarding some way to incorporate robust quick release bumper mounts. In the past we’ve used wing nuts/thumb screws and we are looking for a better(quicker) way that works.

We use a pull pin instead of bolts.

I do not know where we get them, but this is what they look like:

probably at mcmasters.

We are using a system similar to Skunk Works’ off-season drive train here. The over center latches allow us to quickly clamp down our bumpers. We will also have bolts and PEM nuts to secure things.