Corrupt .rar archive in windows, how to repair?

Hey, I have an important .rar that is corrupt that I cannot repair via .par2 etc, because it is my own doing.
I just need to get as much of the file data as possible, whether it extracts corrupt or not. My problem is, if I "keep broken files" in WinRar, it truncates the file at the exact point the corruption begins, which is only like 80mb into a 900mb file.
Is there a way to have WinRar acknowlege the file's corrupt, keep extracting to get as close to 900mb original as possible?
I believe this will require third party recovery software. So if there's any good ones out there (even non-freeware), i'll get it as long as it's reputable to work.
Please help me, it would be appreciated! Thanks!

use winrar
right click file
click repair
These actions have to help you. But if that, it is possible to try it:
Get RAR recovery tool and protect corrupted archives from CRC issues and other problems, damaging corrupted RAR archives of any size. This service can be started on any PC workstation so there are no compatibility problems to be considered
before you start the application, this WinRAR fix tool can do the following:
>>Guarantees the full compatibility with WinRAR and any version of the Microsoft Windows operating system;
>>Opens any version of RAR archive, created in compatible WinRAR applications;
>>Evaluates user chances for data restoration in freeware mode;
>>Works even easier than any other file compression program, it is possible due to the absence of additional settings;
For more information: http://www.rarrecoverytoolbox.com/
As you can look for the answer here:
http://www.filerepairforum.com/forum/archives/archives-aa/winrar/269-how-to-recover-corrupted-rar-files-t-t

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Corrupt .rar archive in windows, how to repair?

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