Try a search under the 'warbirds' forum. you might get some results there too..

Although I have never tried it, there is a 'water tranfer sheet' that you can put through the printer, to make your own decals. Problems are: expencive, so you want to fill up the sheet, and you'll have to fuel proof thedecals once applied. (lustercoat clear coat is good for that..) and anything over 8/5" or 11" will need to be pieced together.

Depending on the size, and complexity of teh decal, something to concider is contacting a sign maker. One who cuts vinyl for signs. He'll have a slew of colours to choose from, and can cut letters, shapes, and even 'old style gothic text' if your heart desires. Speak tot hem,a dn you can probably bring in your own image, and have them cut it owt. Some of the vinyls used, are intended for harsh enviroments, and will / should stand up to the the glow fuels.

If you're talented with sissors, making a print-out of teh decal on regular paper, and use it as a template for cutting out monokote decals can work also. I do that quite a bit..