I'm pretty happy with this rack, but would...
I'm pretty happy with this rack, but would like to get some clamps to keep the bike a little further away from the car to keep the front wheel away from the bumper since it's wearing away the paint. Are there any yakima or other clamps that will fit on the tubes of the Little Joe?
I don't think Yakima makes anything you are looking for, as far as a stop or clamp. You could try plastic hose clamps with a thin piece of rubber (e.g. a small section of tire tube) between the rack tube and the clamp to prevent slippage. Here's an example of the plastic hose clamp: