I have looked into this and it looks to me that the biggest issue is that the starboard side fuel filling location is molded into the top deck of the boat giving it a flat surface where the rest of it is curved. The port side top deck has no such pre-molded location. You may be able to mount the fuel door on a curved surface, just may take trying to find the most flat surface. I have a 17 Mojo and would love to do this as well so if you pull it off be sure to post a How To thread.
David
2017 Moomba Mojo Max Surf Edition, 2 Pair Wetsounds Rev10s powered by an SD2, 6 pair Wetsounds XS650M and Wetsounds XS12 powered by SD6 all controlled by a WS420. 2 Lumitec SeaBlaze X2 Spectrum underwater lights
SOLD***2008 Mobius LSV, Gravity III , Wake Plate, Z5, Exile SX65c's, Exile XM9s, Exile XI12D, Exile Javelin, Exile 30.2***SOLD