I'm also interested in that, i didn't have this since i bought car. and sometimes is hard to reach belt when stuck somewhere behind seats. maybe is not hard to DIY-it at home... could somebody add pictures of that? thanks.
Fiat only part. But to remove them is a better idea as they don;t really line up with the seat belt.
To remove them -
Back of the seat.. Put your hand up to find the two pole from the head rest coming down, you will feel a clip on each, pull the clip together to free the poles, then pull the head rest off. Then you can remove or file down that plastic.
Personally I do not use mine as when you pull the seat belt they come free anyway.
Are these photos any good? The plastic part extends along the top of the seat and has holes for the headrest pillars. The tatty hook in the background is the remains of the soft top storage strap.
Thanks Nino. Still considering what to do about seats. My budget is £0 at the moment but that doesn't mean I won't sort it sometime. Gone are the days of lucky scrapyard finds. People breaking B's seem to charge a fair bit. The cover option is still a consideration.