I had a recent need to use Kreg's mini pocket hole jig and I needed stainless screws. Of course, Kreg only make stainless screws in one size and length, and they are for the standard Kreg jig. I ended up using Phillips rround head stainless screws of the length that I needed and it worked fine. The smaller Kreg drill made a hole almost the prefect size for the stainless screws that Lowes had. I believe they were #7 (from memory).
I know I didn't answer your question, but sometimes you can find standard screw hardware that will work fine with the Kreg jigs and one of them might be the solution. You need the right head diameter and a flat bottom on the head. Satisfy this and most any screw will work. Don't use flat head screws because the bottom side of their heads is cone shaped and will split the wood with the pocket hole.
Central North Carolina