Default [Q] Help needed for Sony Ericsson Xperia Arc S

I had rooted my phone without unlocking the bootloader and I hadn't used a custom rom. While trying to port xperia s apps to my device via cwm recovery, i accidentally wiped the system data. Now all it shows is the SONY on start up and gets stuck there. I cannot go into recovery mode either. The phone does not get detected by the PC companion so I cannot restore the phone as well.

I only have the system app's backup on my SD card.

Is there any way I could flash the stock android or any other roms on my device? Or do I have to send it to a repair shop?

I did try to search for any similar questions but couldn't find any.