Actually you could form a cone w/ good quality epoxy, run a tube down the front of the unit drilled into the plenum under the pump & encase it in. If you hit something you will need to repair it but can probably count on that anyway. Don't worry about the normal pick up just add a low & go it will work. Abour 3/8-1/2" should do. Or forget a cone & go transome mount.

Epoxy cone, more than 5 years & many hours run time,, theres no low pick up in it tho.

A piece of square stock Al. w/ a tube brazed in.

SS elbow threaded into a 1/4 thick reverse feed plate copy. I ran the hydro forgetting to plug the pitot w/ a motor that didn't need it.. the water squirts way above the top of the motor.