Fortunately, Hannants sell a decal sheet of the exact ones I needed. It was £3.05 with free delivery and came within 2 days. Well done Hannants. So, I repainted the underwing decal areas and replaced the decals. All that was left to do was to fix the undercarriage and propellor.
As usual, I had a small (ha!) problem with the propellor. It has a four bladed prop but the only boss that I could find the sprues was a three bladed one. Where the correct part had gone is a mystery. I sanded off the routing slots for the three bales and managed to fit four around it. You wouldn't know.
Last two jobs were to give the model a coat of flat varnish and add the canopy. I decided to have the canopy closed.