Back to the OP - if you can't get a kiln to anneal, at very least get a 1" or thicker piece of fiber cloth and drop your beads off the mandrel onto it and fold the cloth over(or use two pieces, douh!) and set something on top to hold the fiber cloth in contact with the bead. Fiber cloth is a very good insulator and this will slow the cooling down substantially. I don't do bead work (glass fuser) but when I have to pull anything out of my kiln that is over 100 f. I blanket it immediatly to let it finish cooling to room temp. If the kiln is over 185 f. I won't even consider opening it. "I like the pinq! of cracking glass" nobody ever said
It won't be annealing but will substantially reduce stress buildup which will (possibly) lead to future fracturing.