Hello Gus,
I purchased them from a guy who maintains a HAL website. I asked him if he new where I could possible get a set of 1/32 decals for the A-7 Olympus. He told me that he could make them for me. They are expensive (50 Euros) but I figured if I wanted them bad enough it would be worth the price. I actually purchased two of them. They ARE worth the $! He not only included the (4 or 5 full sheets) decal sheets but also includes templates for painting the undercoat (silver & white) for the fuselage, wings and tail. He also helped me with the A-7 VA-46 with the codex numbers and tail letters. I now call him friend! If your interested I can email you a copy of what the decals look like or post a picture here.
Cheers,
Dan