My rear derailleur (9spd M952 XTR) ate a twig, jammed and went into the spokes which resulted in a slightly bent hanger, cage looks that straight, but a tension pulley that has literally cracked in half. I've been trying to source the Shimano listed replacement part, but it appears Shimano doesn't make em anymore. Are there any problems with using a XT tension pulley designed for more modern Shimano 10spd derailleurs -more specifically pulleys made for the M773 XT, provided they have the same amount of teeth?