Thanks, there are some major aftermarket gaskets (Athena, Vesrah) that seem to be reliable over the years. I suppose that sticking with the "name brands", presuming they actually make what is needed, is probably pretty safe. But after reading the threads about the various counterfeit Keihin/Mikuni carbs and the woes people have had it is clear that caveat emptor is still a good practice.
As my wife remarked just now "how much do you save over the Suzuki gasket?" and that seemed a good point.

But I can remember several years ago needing to buy a complete gasket/seal set for an SV650 and I think the kit from Suzuki set me back the better part of $200. I just checked at SuzukiPartsHouse and see GASKET SET 11400-24858,Your Price: $151.64. That's about 17 items including some 10 o-rings from $3-8 and a $24 clutch cover gasket. O-rings shouldn't be that expensive, but then there's the hope that Suzuki has included all that are needed and made sure they were the correct items too. Sometimes, the "budget" options aren't so good about that.
FWIW, there's a $30-40 variance in price on the OEM gasket sets depending on the vendor, so it pays to shop around a bit. That $151 is pretty much the lowest I saw.
Cometic lists some gaskets for the DR650, but none for the LS/S40. A friend found that Cometic was willing to make gaskets for his vintage race bikes if he sent them a DXF CAD drawing, and things like cover gaskets could often be reused several times if some care was taken. I'm going to
think about order
ing the full set from Suzuki to start, and whatever doesn't get used goes into the spares box. I can scan and draw/reverse engineer them and have that as an option if they start to get hard to find.