Workcycles ships Omafiets & Opafiets throughout the world.
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City Bikes | LocalMile
US bike shops think that people here wouldn't want Dutch bikes nor want to pay the cost for them (IGH and stuff is more expensive than cheap derailleurs and caliper brakes) so most shops won't carry them.
A great slightly smaller bike is a Workcycles Gr8. My wife got one about 7 or 8 years ago and loves it. The geometry is one-size-fits-all and works really well for people of all sizes. I've ridden her Gr8 quite a bit and really love it.
[MENTION=442029]Stadjer[/MENTION], Hollandia? Really? My experience with them was quite poor.