Out of curiosity how many "Hero's" do we think were made?
From looking at just photos I count 7 fully built X-Wings on the table.
There are photos that show 4 hero's under construction so I'm guessing they made up Reds 1,2,3 & 5.
The film only shows 3 fully built X-Wings being destroyed, out of those three you can identify two of them as being Red1 & Red2.
Three more partially built X-Wings were destroyed although it's entirely possible it's just one model shot from different angles.
They only seemed to use Red1,2,3 & 5 in all the shots, sometimes duplicating Red5.
I would think that there is a hero out there that looks identical (not including the mount covers) to the pyro although this hero may not have seen screen time. There is a photo showing a Red4 on the table which I haven't noticed in the film unless it was the unidentified X-Wing that got destroyed.