Has anyone replaced 8018 tracks with aftermarket? What kinds of deals are out there. My tracks are 50% and good except one track with a bad cut that's almost to the drive sprocket center. I'd like to find a used one that's close but if I can't I'll bite the bullet and go new,(aftermarket). Who are good suppliers. I have to get something lined up this week. I'm running on borrowed time with the cut track. Thanks.