Well being that there is no bumper beam, I would say that crash safety is somewhat diminished. I think I can fit the bumper beam back in there if trimmed, and I'm sure the I/C core will sustain some of a frontal impact(I'm sure not as much as the beam).
I have a friend that owns a machine shop, and we trade favors. I worked on his Daughters car, and he made me the spacers.. No idea what it would cost to have them replicated.
Bell made me the intercooler, and I opened an account with him. I have a spec sheet somewhere if you would like to replicate it... I am selling the car, so don't really have a need for it.