Check out Byrd and Belle. This is a brand of beautiful, handmade products. The range includes laptop sleeves, iPod/Phone sleeves, wallets and bags. All leather used is hand-dyed in the Byrd and Belle studio using only environmentally friendly dyes. The combination with thick felted merino wool gives the sleeve a premium look. The attention to detail is also great: Look at the placing the leather patch on the bottom of the sleeve, which makes it more comfortable to carry under your arm. Amazing.
Looks like Hard Graft has a serious new competitor if you ask me. Especially because the prices are somewhat more friendly, starting at $68 for the 13″ version.
Available through Etsy.