The intercooler will not mount in the orginal position, it is a squarer unit.
I have pics and can send them to you if you wish.
To mod the not-as-good one, would be welding on a new outlet fitting (and modding the other inlet as required).
The better unit (pretty schmick actually) is a direct bolt on for a GT4 (as was the other one) and hence would need mods (maybe - depending on installation).
Can you do it yourself ? Can you weld alloy ?
I would be after $300 for the 'not-so-good' unit and $500 for the schmick one.
Let me know your email address and I'll send some pics