I'm not sure if the last three digits are 61A or G1A ... I'm looking for the model number for a replacement belt for this mower. It's a 36 inch cut mower and the belt is approximately 65 inches long and about 3/4 inch wide with a depth of about 1/4 of an inch. Does anyone have a suggested model number I might use to find a replacement belt for this riding mower. It's old, but still works...