B4J Question Scene builder Forms to Internal Designer Forms

Hi all,
I have some applications running before B4J had a Internal Designer so I build the forms with Scene Builder.
Now the problem.
To redesign this forms, will cost a lot of time and is not easy too do.
Is there a possibility to convert fxml form's to bjl form's.
The format of the form's are know so it has to be possible.

I think that I'm not the only person with fxml form's

Thanks for help