File Split Gap ... method to fix?

So I asked the fine folks at RE:Vision about it, and they clarified that it's about as good as it gets ... the wispy clouds are not providing distinct pixels, plus they are moving in relation to the aircraft and the mountains differently, so there you go. In order for me to make this seamless, I will have to animate masks and a fractal turbulence a little bit, to simulate the moving clouds for the 1.5 second fix area.

Sadly, they did not respond favorably to my request to purchase a one-time render license. So I either have to find a cracked copy (not my style) or find someone with AE CC and RE:Flex and bribe them (with footage or money) to process this few seconds of video for me.