Yep, that's just the smaller screw. I order from my local EC Power Systems branch. I don't know what other branches are like, but the local branch has always been very accommodating for looking up parts for different applications to find what will work for me. Their website is E C Power

 

I called a place local to me and asked about the smaller filter screw. And well they lost me. They informed me that many come from the factory with the smaller filter screw but they either threw them away or some of the drivers would keep them as a spare. The reason was they replaced them with the larger one to accommodate the much larger filter for extended usage. Go figure

But the small Filter screw from them of which they would have to order was $19.95. WOW.

 

Yeah, the tractor places have been completely useless. I had to do some hunting around to find a place that deals with all kinds of different equipment, and was willing to work with me.

IIRC that price is about right for the part. It was well worth it to be able to buy my filters off the shelf from any parts store. I'm actually using the original Jeep filter part # on mine just to keep it easy.