turbo housing help

[04 hotrod]

i have a silver bulit 62 80 on my 6.0 l powerstroke and i am wanting to go down to a .70 housing on the exhaust. i have called ii a couple times over 3 weeks and they dont have the housings because they are all sold out. my question is who else makes a housing that will fit on the turbo? the housing must also have a internal waste gate.

thanks for your help