I've had to change plenty of standard rads over the years because of the tanks splitting from age, last rad I bought was an Aluminium one and it was off ebay, and was only 120 quid.. And it was a perfect fit, nice welds, good quality to be fair for the price.
Running a standard rad at the moment myself, but if it splits I will be replacing it with aluminium one, simply because it's tanks are aluminium and not plastic and it's cheaper lol