The real questions are what is your budget and what power are you hoping for?
Turbos are set up to provide boost, and the curve and effect of this boost varies. A relatively high compression engine like the 626 won't cope with very much.
You could get a supercharger from a salvage yard or scrap yard and set this up to provide a modest amount of boost. You'll probably need to increase the fuelling as well and will certainly need a computer upgrade so a megasquirt or similar aftermarket ECU will help you tweak everything to get it running.
Borg Warner and Garrett are the popular turbos out there but there are many available.
This is not an easy or cheap job to carry out, i've seen many projects either abandoned or blowing up the engine on the first trip out.