You have the rim in hand, so there's no question of needing or trusting anybody else.. It's in your hand, you measured it. Even if you have a published spec, what do you trust more, your own measurement, checked and rechecked, or a published spec that may or may not be right for the rim that you have in your own hand.

I had no intention of being a life coach, but I'd given you all the help possible, and felt you were ready to fly so I tried to kick you out of the nest. You may run into issues during the build and true, but you're at the stage where the only way to confirm the spoke lengths is to buy them and lace the wheel. As I posted earlier the worst that can happen is that you waste some time and $20.00 or so.