The problem here is the only thing your keeping is the turbine housing and turbine wheel, everything else is not used, Since Precision no longer uses those parts they are to them scrap. I am not even sure their new compressor wheels fit on that turbine wheel or if it fits in the air cooled center housing . This is simply not cost effective you would be paying for a new turbo. So selling what you have is just a better option. Bison may be able to build you something from what you have, if your determined to get some sort of upgrade, he is your best option.
Mike