You can buy one for $29.99 at treadmilldoctor.com. There is free shipping via USPS and I got mine like 2-3 days after I ordered. It was very fast shipping so I wouldn't pay for expedited shipping if I were you. That is the only place I found the key for mine. I did a lot of searching and couldn't find another website that sold that particular key. Hope that I could be of help!
Jessica
May 2010
I can answer this question...
where can I buy the magnet/safety key for my tx 4.9 sportcraft model 04041 ?