couldn't find anything helpful on that site.

 

Read. Its what you do to learn. I spent 10 mins on that site and figured it out.
That is the most helpful site for LEDs.

 

when you find the # just go on ebay and search for that # led.....

 

This should fit yr done light so they say.
http://www.eautoworks.com/product-Putco-113677.htm

 

I did the LED in the cubby hole. I made a DIY write-up in the DIY section called "Ladies and Gentlemen, the LED DIY sumthin sumthin su,thin". I believe I described the method as to how, but if it's not clear enough, message me and I'll help with what I can. Basically, you drill a hole the size of the LED, glue it in, and wire it up! For the cupholder light, I have an idea that may or may not work. Take the bulb out, and find an LED or sumthin of the same size. LEDs are one way current lights, pretty much the same as a regular bulb. You could cut the wire from the bulb holder (metal attatchment) and wire the LED into the wiring directly. I did it to some LED strips for my custom center console. I can get some pics if your interested. I know my idea is hard to understand lol, so if you need help, message me.

 

I know that there is a kit that makes all of the lights in side the cab led's but I can't find it. I think it was on anything auto.

 

Putco or someone does, but not for our trucks. At least not from what I've researched. But I really doubt that if they did, they would do anything with the cupholder light.

 

Like dakotas ram said, your best and cheapest bet is to find something on Ebay