Mopar 340 HI-PO exhaust manifolds (68-70)

So with further investigation I found the numbers. For some reason they are stamped on the back side of both manifolds. The RH side is barely readable but I can make it out. The LH side is much more clear but still, hard to see with out wire brushing them a bit. The RH number is on the furthest most forward exhaust runner on the back side. The LH number is on the down-leg to bolt to the collector. If you have a set that is "numberless" I'd look VERY closely to these two spots and I bet you see them.

Like I said, I've searched everywhere it seems like and cannot find a place that re-pops these. So unless somebody finds a place and can post the link here, I don't believe they are re-made. Thanks for all your help guys and gals, I appreciate it!