J,
Duct Tape won't help. I doubt it would last 10 miles (if that, considering that you are taping something covered in grease). IMHO
I hate to be the bearer of bad news but if the CV is making noise, it's shot. Replacing the boot won't make the noise go away (neither will over packing it with grease - I tried).
I managed to find an axle shop that ground (grinded ???) by hand the outer races (green cup) and 'borrowed' inner races from a spare set of half shafts. He then used oversized balls to compensate for the grinding. All in all, it seemed like a good job - but ...
The MechaTech's I had them install only lasted a year (3 of the 4 had split). I don't wanna diss MechaTech tho. My CVs are at a very harsh angle due to the 3" lift. When I took off the boots & cleaned everything up, I noticed that one bearing is binding in the cage. I'm hoping that the races keep it free but I'm not sure. Anyway, it's running quiet.
Richie,
I'm the one that put on the Dorman grey boots (they're advertised as silicon but I'm not so sure). I can't say how well they'll hold up since I've only put about 50 miles on them so far.