This is a great presentation by Craig on making your own font that is stenciled or bridged. So you can do it yourself.
Also, I found that the time it took to make the bridged fonts, I can edit most drawings and change my mind of which font I want to use. After spending all that time bridging a font, I feel torn to use it or use another font that looks better. For the interior to survive, you reliably need about 0.11 inches.
Here is the problem: You bridge for one particular size of font that gives you a perfect sized bridge for a particular size font. Lets say it was designed for 1-1/2 inch tall letters and then decide to increase your font size to 2-1/2 inches: The bridge will grow larger. You will then need to edit all of those stenciled fonts or you have an unnecessarily large bridge that is obvious and distracting.