I've got a second hand Howard Price 360Z Zero turn mower and am in need of a new Deck Spindle Belt.  The Howard Price # is 20-321.  The broken belts measures 5/8" wide and at least 141" long.  I've seen belts for other mowers listed as 141.5", 142" or 142.5".  I'm not sure which one would fit my mower.  I've looking for a Kevlar High Performance belt in either Oregon, Gates or any other brand.
Any Help??
Thanks
Dan