TBH... if its not avaliable digitally, then your out of luck.
You could bag the vinyl and rip the audio yourself. Quality is then dependant on your set up.
More and more labels are now making their back cat avaliable digitally and some are even repressing a lot of old tracks.
You're welcome to ask where you can get digital versions of tracks on here, but other users should not be giving you illegal links to download them. Its against the terms and conditons of the website and I'm sure the artists don't really like it either.