Right after I posted that I decided to find the search page for you-
K&N Universal Air Filter, Crankcase Vent Filter, Flame Arrestor, and Filter Wrap Search by Dimension
I think the round straight ones at the top of the page are the ones that you need. Just measure the round part of the carb where the filter will attach and search for one with a flange inside dia. that is the same or very close.