West Marine is the same stuff as other places sell...IF you can find the size you need. I just pick which store by the size they sell. Quality is not any better or worse, although Harbor Freight wins the crap award. Since you are so far North McMaster Carr is probably your best bet.
West Marine has 1/2" bungee that I use for making tag lines with bolt snaps on each end. They also have a mid size I think around 3/16" or so bungee that has many uses. Sonoma Outfitters has a nice small 1/8" bungee that works great for bungee backups and wrist mounted gauges. REI has small like 1/16" bungee that works great for many other projects.
West Marine rarely has good deals, and there are only a couple of things I buy there. 2 stroke oil is cheap when it is on sale @ $14.95, so I buy a few gallons at a time that lasts me years. Since they price match, and offer discounts I did buy some of my electronics there as they came within a few dollars of buying from the internet for things like my GPS/depth sounder.
I have Home Depot less than a mile from me and didn't even know they offered bungee??