What are you interested in getting? I was frustrated too by the fact that non-tapered forks seem to be in short supply.

My advice regarding length would be to see if you can set your bike up to mimic the change in riding position and see how it feels before committing to a purchase. Flip the stem, maybe, to drop your bars a little? I made the mistake of buying a Cannondale years back that was a little uncomfortable, but I figured I could tweak things to make it work. 3 stems, one bar, one seatpost, and two forks later, the bike was still incredibly uncomfortable. In all, I spent more on the initially "cheaper" option than I would have if I'd bought the more expensive option from the beginning. And spent several years riding a bike I hated.