Hi Dutch...the Humes & Berg Pixie will do it. They also make an even smaller one called The Glenn Miller Tuxedo Pixie Straight specifically for use with plunger (note: does not play in tune below low C). But my personal recommendation is... NEW lightweight Silver brass trumpet mute - eBay (item 280398170236 end time Sep-23-09 07:38:25 PDT) "Baby" Pixie sized, smaller than Pixie. Yes, Chinese. They ship real fast and these mutes play GREAT. Real brass mutes. Cheap, too. And they play in tune all the way into the low register, when you have the mute deep into the bell (where it needs to be for plunger work). I love mine. Here's another... NEW lightweight Silver brass trumpet mute - eBay (item 300348903894 end time Sep-27-09 22:37:58 PDT) Click the ask-seller-a-questing link, and offer him $10 / free shipping.