Lululemon black toasty techs size 4 (trade size 6)

Perfect condition toasty techs. I am pregnant and my normal size isn’t working for me so I was looking to trade for a size 6/8 in the toasty techs! Lemme know if you have any! I am unsure if they released these again this year or not (brushed inside Luxtreme pants) make offers! Trying to save up for baby gear!