That'll be me ;).
We don't stock those mugs but we have regular containers coming in most months. We can bring quantities of whatever mugs you need as special orders but you'll be waiting anything from 6-10 weeks from order to delivery. The RN coated mugs will be subject to larger minimum orders than 504, other coated mugs could be smaller volumes. Best to contact us either through the forum or via our website if you're interested.