Another vote for Arkel products - I also have the Commuter and it is indeed a great bag.

Here's a list of shops in California that carry Arkel products: http://www.arkel-od.com/us/useful-01-dealers#California. Looks like you may have to do a bit of traveling to see one in person. FWIW I can tell you that Arkel's bags are very high quality; great attachment system, durable fabric, industrial-strength zippers, and well thought-out design. You won't be disappointed, except maybe by the price, but with Arkel you do get what you pay for. I had my LBS order my bag sight unseen and it has held up beautifully, even through winter commuting.