I was wondering if anyone has managed to fit an 8hp in the engine well?

I am an amputee and sail quite literally 'single-handed'. It's been proving difficult to handle the double controls of having throttle and gear select on opposite sides of the standard Tohatsu 6hp, and when combined with the tiller it proves practically impossible. I'm hoping to fit a new sail-drive with the gear select on the throttle arm but these simply don't exist on anything smaller than an 8hp.

So my question is has anyone had an alternative engine/managed to physically fit one where the throttle/gear selection controls are in the same area?

TIA.