Most of the chaps show a much longer inseam (longer) than I need?
A teacher that rides, wish there were more like you when I went to school!!
Yep, like it's been said, trim the length to fit. That's why there's normally snaps at the bottom.
I trimmed mine a little longer (maybe two or three inches) than my pants would be so the chaps cover more of my boots while riding.
IMO, the fit around the thigh is more important than the waist. The waist is adjustable, usually with a lace in the back and a belt in front.
But the thigh part isn't adjustable at all so you want a comfortable fit there. (well, on the one's you linked to, they are somewhat, which is a good thing)
Because of this fit being on the top of my list, I decided not to buy online. But LeatherUp does seem to have a decent sounding exchange policy, as long as ya get the item back within 30 days.
I went through quite a few different chaps until I found ones that fit my thigh to my liking. The waist was a little big though, so I had to add an extra hole to the belt, even with the lace part in the back as close together as possible.
I also got a pair that had jean type front pockets on each leg instead of just the standard single tiny pocket (which isn't very useful in IMO).