I just hook the leash through the D ring on both the Easy Walk and the collar. I had to get a slightly bigger leash to accommodate both, but it works fine.

 

Ha, I do the exact same thing. And I don't think it messes up the "anti-pulling" mechanics. In fact I think it helps keep the harness aligned properly in the middle of her chest instead of shifting towards me as it can tend to do if the dog is pulling a little bit.

 

You could try a saddlery shop. Horse people have all sorts of clips and leads.

I think if you put the lead through the D ring on the harness and then attach that to the collar you will nullify the purpose of the attachment point.

Try and find a hands free leash. One that has rings sown into the leash at different points. YOu could then fit a clip to one of the D rings, run the leash through the harness D ring and attach the end clip to the collar, and the second clip to the harness, leaving a loose loop of leash between the 2 as your safety.

 

If you could find a very small traffic lead you could put the loop on the collar and clip the clip to the harness.

 

http://www.amazon.com/gp/product/B003HFEQ3W/ref=oh_details_o06_s00_i00
use a keyring on the bottom