Quote
I forgot to mention I had the radiator cleaned at the same time I replaced the thermostat.


If the thermostats working and the radiator had cold spots then chanches are that the radiators clogged. Get a new one at Radiator Barn as previously suggested and go from there.
You might want to take the old radiator back to whomever "cleaned" it if the new radiator solves your problem for a refund.

'04 Taco x-cab 3RZ FE stock (daily driver)
'90 x-cab 22RE stock
'82 Hilux 6" lift (ACES HI)
'82 2-Hiluxs' Rally Edition (parts)
'81 Hilux 3" lift (parts/restore)