wooden unit blocks

I'm interested in a US Maple or maybe European Beech set of unit blocks for 2 and 5 yo. We have a beginner set of blocks, maybe 35 pcs. I've been looking at Barclay Blocks website, they manuf. the maple blocks and import the Beech ones. I don't believe there's anywhere locally I could buy such a set.

Any favorite block sets or vendors?

thanks!