Changing manual mirrors on the 1999-2007(Classic) body style is stupid easy. Pop off the little triangle cover, three nuts, old mirror comes off. New mirror slides in, three nuts back on, then pop the cover back in place. Takes less time than trying to strap on one of those aftermarket tow mirrors, and you only have to do it ONCE.
The mirrors need to hang LEVEL, though. Some of the cheap aftermarket tow mirrors sit at an upward angle, and it's disorienting. Mine are like that, and I've just never been able to find a good position for them.