I bought a Rolif banjo mute about 20 years ago & it has adorned every banjo I've had from a windsor - Vega- Deering- Gold Tone plus a few of dubious make. It is simply two stainless steel bars with a bit of green felt stuck on and two knurled bolts that go through both passing thro the strings behind the bridge- Instantly variable from full tone to total mute just by sliding it up & down the strings - I was told that these are no longer made, but anyone with basic DIY skills could knock something similar up in no time at all. It also looks pretty good as it is very highly polished.