You don't ask for much do you It's going to be near impossible to find another quality kilt in wool for $160. The question about other tartans from Stillwater is the $64,000 question though. According to their web site they are making sure the manufacturing and cloth issues are resolved before releaseing any new tartans other than BW and Black.

If you are open to PV, try USA Kilts for some great options. Their casual is $110 delivered and their semi-traditionals (still PV) are about $230.

If you are interested in contemporary kilts there are some great deals at Freedom Kilts.