If you already know that the win32-vanilla list is the place for this, why do you think that asking in an unrelated forum will get you a better response? Also, have you tried building 5.14 yourself? If it has now been a whole six months, you should have made some headway in that direction if the issue is so pressing for you. If you are unable to attempt building your own Perl, ActiveState Perl offers a distribution quite similar to Strawberry Perl. Maybe you want to use their distribution?
Again, if you want to have some reliable plan, you will have to pay for it. Coincidentially, ActiveState also sells commercial support.