Just google search superbrightleds.com. led direct replacement bulbs can get crazy expensive. I replaced all of my interior bulbs with leds as well as my tail lights, side markers and parking lights up front. For the interior I added kick plate leds. For the kick plate (and glove box light) I purchased a 15 ft length of led strip lights that are adhesive backed. The led strip lights can be cut every few inches depending on the amount of light needed. All you have to do with the strip lights that can be cut to varying lengths is to solder a wire to both the positive and negative polaritys. They can be all wired together and added to one circuit (Mine are wired to the dome light switch). Now I have more than enough light in the cab.
For my parking lights, I found a pair of amber leds (4 leds per strip) and wired them into the parking light power supply. The parking light housing was opened up and the leds were glued into the back of the housing so that the leds face towards the lens. The three leds are about twice the brightness of the incandescents and they wont melt the housing or bulb socket like the bulbs do.
