You could try 10 or 13-oz wool. they breath pretty well. You could get a contemporary kilt in cotton or cotton-poly from a place like Freedom Kilts or CCK. You could try USA kilts for a casual or semi-trad in poly-viscose, but I'm not sure they carry your preferred tartan. There are a lot of options. There are also a lot of kilties on this forum from AZ, so look for their posts which I'm sure you'll see on this thread soon.