Would anyone have a source for a belt for my 48" 50048s deck? This is for a duratrac deck. The parts list calls for part number 1750842 which is 1/2 x 118.6 I measured the old one and it is 116 but is very tight so I believe that the 188.6 would be right. I would think that a 118 would be ok. Thank you for any help.