Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Mine's broken ash - awaiting your magic :-)...
I'm forever fixing touch lamps. When the bulb blows, it takes out the triac. I put a higher spec one in that has a higher forward current, but still the same TO220 package. One they've been modified they stay fixed.Perhaps you need to do something similar with those power supplies.
How about mounting the resistors remotely on a heatsink?