Burt, since we're an engraving company -- I can make you a fine record cert with whatever speed and other information you wish. I can't have Dan or anyone sign it, but you could probably get one of the neighborhood grandchildren to do that.
I guess I'd maybe put something across the cert saying "copy" or draft proposal or something, but still -- you can hang it on the wall and tell folks that the "real" one is in the mail. Sound like an idea?
I dunno what I'd charge, though -- maybe $6k-10k depending on what size document you want it to look like, and also dependent on how much over the existing record you want to be (i.e. .001MPH over will be no additional charge, +.002 - 5.99 mph = $250/mile or fraction thereof, and 6 - 100 will be unh, mmm, ahh, how 'bout $900/mile over the existing.
Sound fair? All you'll need to do is get me all of the required information to go on it and maybe a real certificate. That'd help a lot. If you don't have one I'll get one of the kids in my neighborhood to draw one up with his sidewalk chalk sticks.
Let me know.