Finally got around to replacing a UN26 BB with a UN300. I was shocked at how decent this thing is for $20. Bearings are the same size carts as Phil Wood. But
Shimano BB-UN26-K Cartridge Bottom Bracket - Scott's Cycle and Sports | Kennewick & Hermiston Bike Shops
Shimano BB UN26 73mm Bottom Bracket Square Taper - Rebec and Kroes Cycle & Sport