Any idea when a new shipment of some size 30 or 31 coming in?

I been actually thinking of picking up a pair of 666s. This would be my first iron heart pair so im not sure how the measurement is. I have had Nudies slim kims size 29, Imperial Shearer/dukes size 29, and Imperial sexi08 in size 30. My true size would be a 30 so im wondering if i should get a pair in size 30 or size down. I'm about 5'9 and weight about 140 pounds.