I have an old mountain bike that has been converted to drop levers (this meant I needed - well didn't need but got - a threaded to threadless adapter and new stem) and you might be able to find stem shifters that bolt on instead of bar ends if you prefer. These will also run you about $20 for a set, but I like how they work on my bike. For some reason I just don't like bar ends. Some nice tektro aero levers are awesome. I think I found an easton stem and bars at Jenson for $25 total and the tape was $10. The levers were ~$25, and the brake cables were ~$5. With tools (4th hand and cable cutter) the project easily ran over $100, but was something I enjoyed doing and like my bike much better now than the previous setup.