UFO & Outer Space #22 painted cover

There was UFO fever in the late 70s, and I had it. I eagerly picked up any copies of Gold Key's UFO & OUTER SPACE (formerly UFO FLYING SAUCERS) that I could find. The original art has been elusive, but I finally managed to get this beautiful painted cover to issue #22, with the then-popular "ancient astronauts" theme. I only wish I knew who painted it. Anyone who has an idea, please post it in the comments! And let me know if you have interior art or covers from this series to sell.