A few of us from Mazdatruckin are running Zirgo fans from ebay.
I haven't heard a single complaint about 'em.
Just make sure you get curved blades... the straight blades are really loud.
i ran a single 14" that i got off ebay. dont remember the brand was around $20. had it hooked to a switched relay which ran when the truck was on. you can even get a temp control switch to make it come on when needed.
I'm not using a stock radiator, but I'm running a 16 and a 12.
I think Dan Woodland has a 14 with his stock rad, but I could be wrong.
Just measure yours and go with what fits.
i ran a 14" as a puller behind the radiator (between the rad and the engine) used the stock rad shroud with it, with a stock rad for over a year with no problems. also had it wired to run when the ignition switch was on.