That template is looking really good, so you deserve some more pics from my "National" archives.
They come actually from only 7 books. This is when you find out why old books are so worthy.
First one is more of a historical curiosity: crew of a shot down Dornier Wall recovered at Cabrera Island by B-4 submarine, during battle for Mallorca. You can see S-1 behind them.
This is probably the most interesting: S-5 at Graus reservoir, preparing for an attack on Sietamo, near Huesca.
I cannot distinguish the number on this one departing from Barcelona port to attack Mallorca (sorry for the bad quality, they are really old books). It's a beautiful pic though.
And this one is as a special gift. It's a pity I couldn't find it before. One of S-55 at the port of Palma de Mallorca. Photo was probably taken just after arrival, with no identifications to avoid diplomatic conflict.
BTW, I've been thinking about the great scheme you made for S-55, with the red bands over wings. I know that these colours were often used, especially in those early years, besides, it's almost impossible to know the real colour from these bad quality pics. But logics had been sparkling in my rusty brain and I thought that those bands were probably painted in black or at least blue:
No Nationalist plane would sport so conspicuous red bands to avoid missidentification, even more with a so unique aircraft model, that couldn't be recognized by most pilots. It's something that several pilots speak about in their memories: colours had to be defined in the first weeks of war to make clear which side they belonged. The same way, black painted planes were often shot at in Republican side.
Another detail, if you start working on S-62 skins (no hurry, I would be really happy to see any of them) is about the Nationalist profile I posted. The monarchic banner on the fin is not very plausible. Nationalist never used those colours in their planes until war was over (again to avoid missidentification) they actually sported the Republican 3 coloured banner for the first week of war, since they hadn't choose their symbols yet. From the second week on, all Nationalist planes had the St. Andrews cross on their fins.