Compression leggings (20-30 mmhg, not sheer)?

Does anyone have a recommendation for maternity compression leggings (20-30 mmhg) that aren’t see through? I can find lots of stockings/tights, but I’m due in August so it’s not exactly tights season. Knee-high socks won’t cut it because I’m having the vein problems on my thighs especially. Leggings seem like the best option, but I can’t actually find any that are medical grade firm compression.