Blast gun recommendations

I am finally getting able to get my blast cabinet back up and running. I want to make some upgrades to it as well as the repairs it needs. It is the cheap Summit cabinet. I did have the forethought enough to assemble it sealing it with RTV at every seam so leaks were never a problem.

What I cannot STAND is the cheap *** blasting gun. It's never siphoned too good. It goes through the white ceramic tips REAL fast. I know there has to be better guns out there with better (steel?) tips available that siphon a lot better. I am not opposed to spending some coin if something will actually WORK.

Yall got any ideas?