Fark!
Evidently it's still available through industrial supply. Word is that Grainger carries it. Some BS about EPA VOC regulations caused Krylon to re-formulate the product. The replacement sheen ("satin") is much more glossy and doesn't even come close to the 1613 semi-flat which, IMHO, is almost a dead ringer for JBL OEM. Halfway through a refinish on a 4311B pair and I ran out...