Reddit reviews Sunrace SLR03 Friction Stem Shifter - 28.6mm

If you can spare another ten dollars, these basic sunrace shifters should work for that bike, there's a few different variations so you can measure your tubing to be sure.

I got some downtube shifters from amazon pretty cheap, and they've been working great for me so far.

They look cheap, because they are cheap, but I liked them more than my stem shifters. I didn't want to disassemble my stem shifters to put on this bracket, but you probably could if you wanted.

http://www.amazon.com/Sunrace-SLR03-Friction-Stem-Shifter/dp/B0084UHAJM/ref=sr_1_2?ie=UTF8&qid=1449807462&sr=8-2&keywords=Downtube+shifters

EDIT: they even came with cables

Are you talking about stem shifters?