Weed Eater One

I have a weedeater one, we261, model #9602400001 01, serial # 010811L001970, purchased in 2011. a recall on the friction wheel is in place for my model, but excludes my serial # for some reason. I have the same exact issue that is reflected in the service bulletin #B2010002015, but the service company statess the wheel is not under warrantee. They also stated that the wheel itself cannot be ordered, that the entire transmission assembly must be replaced at a cost of $320 plus tax and labor! This cost is more than the mower is worth! Please advise why this fault in manufacturing that hundreds of other people are also experiencing, is not covered by the bulletin, or at minimum, how I can obtain just the friction wheel...I can replace the $20 part myself. Please dont reply and say i must buy the entire transmission! thank you for your help in this matter.