Making a replacement radiator with metal tanks would be very costly. Our custom jobs like that start out at $600 and go up from there.
Most people don't know how much labor goes into custom built radiators.
There are some brands with plastic tanks that I don't like to sell.
Reach
CSF
Silla
Better brands are Loyyo, Visteon, Valeo, GDI and our main supplier although Chinese usually Cool line. So far the Chinese Cool line parts are good quality.
I have sold and replaced dozens of Titan rads in the last couple of years.
I'd stay away from the all aluminum ones my self. Thats a big chunk of change and for the most part they are not repairable if a rock or something causes a leak.