I just use a standard show slip leash. Again I prefer the flat leather ones rather than the rolled ones. Also if they can be a soft leather it's easier to roll it up and keep it out of the way whilst you are showing the dog. I use quite short leads again just to avoid having loads of excess lead to gather up or trip over.
Here's a picture of one similar to what I use. Dog moda on the directory of this site have some different types of show leads available and I'm not sure if you'd have met him or not at deerhound shows but Toon (think I've got the spelling right) has some brilliant leads available. He's from Germany I think but comes over to the UK breedshows and crufts.
This was from
www.hideandcollars.co.uk/index.htm