Yup, checking up, the PPG number for Delstar Acrylic Enamel is DAR 51049
Dupont 88419 is supposed to be the equivalent, which is Midnight Canyon Red.
Tower Paint in Wisconsin offers paints to match these codes as a special order Yarocki Red, at least they still did a couple of years ago.
Actually have a tin of original Indian Red air dry enamel partially full here. Keep meaning to open it and have some scanned. Have tried this a couple of times before with other paint colours, and they never seem to reproduce exactly as the original, usually needs the experienced eye of a paint guy to tweak the colours a little.