I found it

I finally found that warehouse that Mario told me about.... That pipe that the toad I saved was guarded by some Koopas, I killed them with ease.... the pipe lead me near the location of the warehouse, but I did find it... I had my shotgun on the lock and fired a shot... the warehouse hasn't been open since Mario left it... I managed to contact some contacts to take the stuff home... Man my assault rifle I had broke... good thing I found parts to make an upgrade...