I just picked up a Super 88 LP tractor.  It was missing a few items which most are fairly common except one--the carb.  By the parts book it should be Zenith # 11942 carb &amp; 2nd stage regulator assy.  My questions are: is this particular carb used on anything else? Also does anyone possibly have one or know where one is?  I do have one from an old MM which I could possibly make if I cant find one.  Thanks for any help!!