Tapatalk is being removed immediately. There are security issues and there is no justification for having it anymore. I apolgize to those die-hard Tapatalk users but you'll need to start using the forums mobile version instead.
look at the part numbers in realoem, the bav seats do share numbers with e12 and e24. just not the e9
The best thing you can do is get the scheels and see how far off they are. I've seen them mounted to recaro universal sliders.