Where can I find and purchase a sales/selling film that was hosted by
one of the Jim Henson Muppets?

Force--

I have carefully researched your question and have your answer.

There are a number of sales-training videos available featuring the
Jim Henson Muppets.

To conduct this research, I searched the following terms: muppets sales video

You may view the results of my Google search online. The link is
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=muppets+sales+video

A company called Enterprise Media seems to be the main company that
offers sales/selling videos hosted by Jim Henson Muppets. And they
sound like a lot of fun. The company's web site even allows you to
watch clips of the videos online. I checked out a couple to make sure
it's what you're looking for.

Here are a few of the MUPPET MEETING FILMSTM that have been very
popular (or that we've laughed at a lot here at Enterprise Media).

Sell Sell Sell (THE bestselling title.) Now available on DVD! 
The Meeting That Would Not Die (Does your meeting feel like it's out
of a horror film, if so, then this is for you.)
Let's Have the Dam Break (When you REALLY need to take a break.) Now
available on DVD!
Win! Win! Win! (Another bestseller!)Now available on DVD! 
What's This Meeting All About? 
The B.I.G. Plan Now available on DVD! 
How To Sell Now available on DVD! 
New Release: Teamwork in Action (turn chaos into order)

You may access that full list online. The link is
http://www.enterprisemedia.com/Muppet.html

You may read more about "Sell Sell Sell" online. The link is
http://www.enterprisemedia.com/Muppet.html#anchor461667

You may read more about "How To Sell" online. The link is 
http://www.enterprisemedia.com/Muppet.html#anchor456187

I hope this helps. If you need any further information or any
clarification, please don't hesitate to hit the "clarify" button.

Thanks,

darrel-ga