I did a bit more digging and don't see a lot of savings to be had. Bluesea sells toggle switches, available from defender for $6.69 each. On digi-key I can find similar switches, rated for 15A for about $5.50. Not a great savings. Bluesea sells indicator Led's for $3, they're $2 on digikey.
As for labels I used these and would reccomend them.
BLUE SEA SYSTEMS Label Kit at West Marine
I also attached some pictures of my panel. And here are links to the parts I mentioned
S301F/U NKK Switches | S301F/U-ND | DigiKey
Blue Sea Systems WeatherDeck Toggle Switch
Blue Sea Systems LED Indicator Light
EDIT: For completeness I'll add that mcmaster also has an entire selection of toggle switches as well for good prices including "Harsh Environment" and miniature.
McMaster is also a convenient place to get crimp terminals including adhesive lined heat shrink.