Why are we stuck with one kind of saddlebag? I saw givi makes a nice, inexpensive set of saddle bags for around 250.00 or so for the pair, the E21, But theres no mounts for it for the spyder, instead we seem to be locked into these 500+ dollar set of saddlebags. And they only get more expensive from there, to the corbin ones. Do they make a mount for the E21 saddlebags, because I have not been able to find any for the spyder.