I bought mine at an Adidas outlet store. Don't know if you have one of those by you or not? Otherwise, you could try looking at www.adidas.com or www.ladyfootlocker.com - they may have some.
I wear pants/capris also. I HATE shorts and they're never comfy. The tighter pants (not too tight) are always just right for me and they're not terribly hot. I buy mine at Target, too.
Actually, better than I thought. I haven't done anything cardio in so long (or anything for that matter) I thought my lungs would be hurtin'...they were but still ok. Only my calves are a little sore today. Thanks for asking!