Find a half Asian, half white egg donor?

Seriously? It's a genetic crap shoot. You may have a chance of paler skinned kids depending on your husbands genetic background, but it's not very likely.

There is no treatment using your own genetic material that would give your children more "white looking" traits.

I'm half white, half Asian myself (my dad is a double recessive, and no, I'm NOT volunteering), and I've never had a problem with looking somewhat Asian. Heck, it's actually been to my detriment to not look so Asian.