As of right now the cheapest I've found is $88, I thought I seen them cheaper before as well. Then again last time I ordered parts it seemed like most of them got a little more expensive. Must be the euro vs. USD fluctuations? Oops, I assumed that the woodruff keys came in pairs, I now see that they don't.
Why did you remove the thermostat housing? Did it help to get to the tensioner or what?
At 4* I probably would of just got a woodruff key, but being I'm nearing 6* I may just as well do the new chain. I just hope that the IP hasn't been readjusted for the 6* or anywhere close so when I get back to 0* it won't be advanced a ways. Did it seem to idle smoother after the new key? I'm surely going to be overcautious about dropping stuff in there while doing the chain. I can almost imagine it already, almost done, just getting ready to crimp the new end link on and whoops.... I hope it is at least metallic so I can go fishin'.