If you want an espresso blend with 100% high grown arabias, try Green Mountain Fair Trade Organic Espresso Blend. It's what I drink at home and most days, I get rich red/brown rust colored crema.
The more I brew, the fewer streams of white I get (white spots & streaks in crema is a sign of over-extraction).
There are a lot of good espresso blends on coffee review. I don't recall whether they talk about 100 arabica or not, but I bet a lot of those reviewed over 90 points have not robusta in them.