Just get a used MC-20 or MC-30. Since they aren't the "latest thing out", their prices are more in line with what they are really worth. The only one that I ever had go bad was one that "caught" my camera as it was falling off a tripod at at wedding. The jerk stained the plug that goes into the camera, but it still took it another two years before it really became inoperable. I'm not sure if some of the aftermarket types would fare as well, but. . .they're cheaper.