I know this is kind of...late?
but anyway, you can easilly change the save file yourself!
Just download that save file, and rename it from .sav to .sg1
Lets say I have a Pokemon Fire Red Save. For Regular VBA, it would show up as Pokemon Fire Red.sav
If I click on the name of the file, it becomes highlighted, and I can change it! So, just rename it Pokemon Fire Red.sg1 , and it is converted!
Anyway, just thought I would help here...