oh heck no, garter belts and stockings can be had almost anywhere.
Walk into any victoria's secret or lingerie shop.
That's what yanks call hose that only come up to mid thigh and are held up with garters...Stockings.
I'm not sure, but I think what you call stockings, we call socks. the items that both men and womens where that come up to ankle, mid calf or knees.
Yeah, tights....to me they are either what ballet dancers wear, or when you go exercise....although today women more wear shorts, sweat pants, yoga pants to the gyms.
Also, tights are what little girls wear in the winter, they are heavier and keep the legs warm.
I keep hearing ladies underwear referred to as "knickers" to me, that sound really cute and quaint, like bloomers, only slightly naughty.
Women here general refer to the undergarments that cover their bums as just "underwear" or "underpants" or "Panties" of course, now we have thongs, I won't even begin to address that.