I imagine that what clips are used and what they hold is dependent on model (230, 280, etc), year, and perhaps drive side.
This photo is my LHD '66 230SL, and shows the tach cable on the upper left of the H, the vacuum line on the upper right, and what I presume to be the capillary line running through 2 clips on the crossbar of the H.
I would say that #79 in Matt's original post is the clip for the vacuum line. The clip that holds my tach cable on the upper left of the H appears to be the one that BobH has pointed out from Authentic Classics; on my car it does not go through the square/rectangular hole, but just clips over the top of the H bracket.
So Matt, if you like that answer, it looks like you'll be out less that $5!