I'm giving these newfangled "Dia Compe Silver Shifters" a try on my bike. The price has gone up this year like most cycling gear.
They have a friction ratchet mechanism similar to the old Suntour Power shifters, but this design is more compact. Early days yet, but they seem to be working well and are fine working with a 9 speed cassette.
http://www.diacompe.com.tw/product/silver-w-shift-lever/
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I had the bar-end version of these on a commuter bike. Easy to use and reliable.