Hi,
I don't have these mutations, but I wasn't able to find anyone with mine either. There are so many, you may not run across someone with the same combination as you, especially if one is really rare.
I'm very new to this board, but from what I've learned so far, you really can't predict anything based on the mutations you have. So if you do find someone else with the same genotype, your little ones could still have an easier or a harder time of things.
Good luck!
Sarah
(G551/R75Q, 32 years old, still awaiting official diagnosis)