You can get an 11-36 cassette, which would give you a lower low. Also, you can change the crankset to a MTB crankset, which I think I misled you on in the previous post. The problem is the big ring is going to be 42t. So you lose quite a bit at the top end. The upside, if you don't miss the top end, is that you'll probably be able to stay on that ring nearly all the time. You could also swap to that on tours, but I'd think you'd miss the higher gears. It's a tough decision, so I'm sympathetic to what you're going through.