Hi, I got teh same model CT210 as our home taxi, we replaced with a local "Rad****r Hou**" I think cost
was about Rs 11,000 about an year ago and still works very well, after all the replacement is a copper one.
I am not convinced of any of these repir stuff as they are good to stop leaks other than the areas you got the problem.
Also, the recon ones can be in the range of Rs 15 to 23 ,ooo/- still you wouldn't know of the condition and for how long that would last too.
The only issue is if you want to sell it specially, and when you open the bonnet the radiator doesn't look as neat as the original one.
But it serves the purpose and will last for a very long time.