I hate to say this but we have seen some excellent sheets from Portugal at our local HomeGoods store here in New England. I think that they have stores in CA and the prices were very reasonable. I happen to be a big fan of HomeGoods.
Since we visited Portmerion in Wales numerous years ago, I have been collecting their Botanic Garden collection. I have been able to purchase many lovely pieces of Portmerion. Much cheaper than yet another trip to Wales which I love. Easier than having it shipped home. Just a thought...
You can find amazing LAMEIRINHO sheets at www.lameirinhostore.com.
The satin 100% cotton ones are absolutely out of this world! Just for you to know LAMEIRINHO is a Portuguese company that produces sheet sets for the best brands in the world :)