We went to a surplus store in Reno, and found a couple of knobs that might work. Then we started to go to one of the two Saver's stores, but Lisa balked because this one has one of its exit doors bolted, barred, and blocked. She won't go into places that block fire exits. It only takes one bad day to kill you, and she says people are too blasé about fire safety. So we went on to do some grocery shopping and headed home.
On our way home, we saw that the owner of Hanneman's Tow/Propane Service (we have used both of these, and they've been very nice to us) was in the shop, so we went home and grabbed the present we had purchased for him and his crew: a box of chocolates from Cost Plus World Market. We gave them cookies last year. They've been so nice to us throughout the year, and their work is 24/7 and means they can (and probably will) have their holiday interrupted with an emergency tow call at any hour of the day or night, so we like doing nice things for them.
Lisa has come down with some sort of sinus infection. We hope that I don't also get it, but I'm expecting to probably have to do battle with it myself.