Yep, or take the vertical piece and rotate it 90 degrees so it will fit horizontally, then squish vertically the other pieces and stretch them horizontally a bit and add the new piece to the top or the bottom.
Absolutely! Thanks to all for the great advice, I definitely agree that this should be taken into account early on. Considering the time limits and the need for all materials on the texture I think they'll have to stay for now, but next time, design around that for sure. The best solution for the time we have, is to have…