I have a set of Albatross bars that I grab primarily at the ends. It seems most people who replace drop bars with a-bars also lengthen their stem, so presumably not doing that would bring the bars in closer. But then that's not as aggressive of a a position and might not be what you're looking for. You can still grab them at the bend, but again that puts you ahead of your stem, but possibly not as far ahead as mustache bars.