me and a couple of my friends are doing a "group buy" on this website:
www.superbrightleds.com
They have all sorts of sizes, they even have the #74 size LED bulb replacements for the gauge clusters on most cars.
They are cheap as hell and 5 bucks for shipping no matter how many you buy
The website looks oldskool but its all legit, and you get your items within a week
