You may need to splice these onto the wires in there, but they will probably be long enough. The entire length, including the bulb, is about 12 inches, and the bulb is 3mm in diameter. These are brand new bulbs and are guaranteed to work great for you. I use these on all the gear I work on--they are incredibly nice. Please note that replacing the dial pointer bulb in these tuners can be very difficult, and I do not have instructions or a video, sorry.
US shipping and handling is $5, and international is $18, no matter what quantity you buy. All my small parts are set up for combined shipping, so just use the "add to cart" feature and then check out all at once, and it will combine shipping. If you have any questions, please ask.
I have more lights and other vintage electronics listed--feel free to take a look!