On here, no I have not posted that tool. But I know exactly what tool your talking about as I do own it, and love it to death. Its for use with the self adjusting clamps we have, and works wonders with that bastard of a lower hose clamp.
Here is the tool:

• New ratchet feature provides amazing control of jaws.
• Suitable for both standard & space saver clamps from 3/4" to 2 3/32".
They can run you anywhere from around $30.00 to $150.00
Not sure if local auto parts stores have them or not. (Autozone/O'Reilly's for example) I think I got mine off line. I know for sure
ToolParadise.com - It's Paradise for Tools! Professional Tools for the Mechanic and Serious Hobbyist has them.
~F~