looks like you have a few options, one being their setup or having someone make one.... Personally, I wouldn't want my fuel feed line to be fairly close to an exhaust unless it was properly shielded....
Again, IMHO the best alternative would be one in each wheel well, the one in the left wheel well feeding the aux tank, and the one in the right wheel well feeding the main tank.... the pumping idea is probably the best, but more complex, but it all depends on the design.... feel free to e-mail me if you want to further understand what I am talking about....
phazer42@comcast.net