I recommend both
amazon and
ebay. There is some lovely stuff out there mostly from China at prices for outstanding leather that is unbeatable. If you look at my earlier post, the one for the SP3 is sold full width cow leather with great stitching.
The Surface 3 case also from dpark is a combination leather/wool. Wool actually makes more sense than you think as it is absorbent and protective.
I like read too. I always choose Surface with the red keyboards. I also got my Surface 3 cover from China by DHL in 3 days.