We can't give you a link for downloading PSN version of GTA V to your PC, because a unique link is generated for each purchase so it would only work on a corresponding account through which it was purchased.
First you would have to buy it on your PS3 using a PSN card. On a US account, it would cost $60. Then you have to connect your PS3 to your PC by some proxy method which @
TrueCoolGuy can link you to. Then you would get the unique link to download it on your PC. Then after it has been downloaded on your PC, you can transfer it to your PS3 through the proxy method.