I just received in the mail today a pair of MKS chain tensioners, but, much to my vexation, the track ends on my Alien are too wide and the wheel is too far forward for how long the tensioners can extend. I bent one of the forks of a track end in a wreck so my wheel slips forward gradually while I ride because it doesn't grip well enough as they are slightly off parallel. Although it is not quite life threatening, I really need a solution. Will BMX shops have what I need?