Could you post a few images so we can assess how hard would be the ocr step?
Assuming it's not a captcha or similar, I can provide the bot in just a working day.
I will deliver:
* the requested tool (OCR image, and rename according to its contents)
* complete source code in Python
* compatible with Windows (XP up to Windows 8.1, the later in "desktop" mode). Linux compatibility on request.
* and of course, complete support for using it
* On Windows, if you prefer, I can deliver an executable (.exe) with corresponding install/uninstall program.