I can tell I've been around for awhile when I start updating my original videos. Last week I updated my two-handed camera stabilizer and this week I revisit the shotgun mic shockmount. When I created a DIY version, it was due to no retail version being cheap enough. Well, I found a cheap version, bought it, and compare it to my DIY creation.
$10 Microphone Shockmount on eBay
5/8" to 3/8" screw adapter on eBay
3/8" to 1/4" screw adapter on eBay
Cold foot to 1/4" screw adapter on eBay
Watch "Painter's Pole Mic Adapter"