I know this is a long shot, but I just purchased a SEM ignition coil off eBay for my 2100 and got screwed on it, it doesn't work. So I would like to purchase another one. Let me know what you've got.
Can't you file a claim with ebay ? Or was it a no return , possibly won't work item. Either way that stinks. I've been trying to find a reasonably priced one for my stihl 056 super. There was a member here selling a new one and flywheel. Do a search and it should pop up.