He still pops in here, over in the engine build forum.

 

Alex is around, definitely not long gone.

 

I still pop in every few days, just not as much as I used to!

I never actually did this, but I am fairly certain it's possible. The question would be how much. The pump itself has a mechanical limitation, and the harder you push it the shorter the lifespan will be. You could retain all of the old housing, but upgrade the pump itself. That is fairly common on other makes of vehicle, and if I needed more fuel pressure (or flow) that is the route I would take.