I found a very reasonable place that sells vinyl lettering on line. I didn't want to spend much on my N number because someday I will replace the decals when I paint. Also, I wanted individual letters for the "Experimental" decal inside the plane instead of a bumper sticker type of deal.
I got both my N numbers and the "Experimental" decals for $11.41 total with free shipping. 3" N numbers were $3.12 for each side and the 2" experimental was $4.20 plus tax since I'm in California and so are they.
They messed up my N number but they are sending me replacements. Good thing though because this allows me to practice.
I specified the FAA requirements for the N number and they nailed it.
Here I praticed with the one of the screwed up numbers and attached it to the inside of a scrap aileron of mine. (Long story, don't ask)
Finally, the experimental treatment. Fake flowers compliments of my wife:
The place is called AlwaysSign.com. Shipment was lightning quick!