SP superflow o-ring size?

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What size o-ring are you using on the 2nd stage connection of the scubapro superflow LP hose? The scubapro part # is 01.050.375. I tried a metric 1 X 7 mm and the OD looks good but it does not seat reliably as it looks a little too thin. Next metric option up is 1.5 x 7 mm which still looks a little thick but I'm going to order unless someone has a better alternative. The thicker alternatives of the 2-010 and 3-902 are too thick and difficult to tighten or interfer with the swivel action. It looks to me like it wants something about 3/32 or 1.25 mm wide. Anybody found a good solution other than the OEM o-ring?

Thanks