I think the repros come from same molding, you can even order 71 and trim it yourself to 70. Sometimes they are available on Ebay, for 850 USD piece.
I was looking also OEM 71 long time, but prices was way over 1000 USD when ever you could find one on sale.
Then I found one project 70 bumper (3 out of 4 bolts broken) from this forum, fixed the bolts and little massaging.
I am happy for it, and in black car it is hard to see that opening is bigger than it should.