Sorry to disappoint mate - as far as I know, these are the only OEM type available for the E53. But correct me if I'm wrong someone...

They do the job though. You can fold/unfold them to get through width barriers at speeds less than 5mph, and they match the width of the running boards.

I did read somewhere about a company doing M5 style mirrors for the E53.

Actually, I've got an E39 M5 mirror in my garage, I'll see how different the base-plate footprint is. Pretty sure the E53 ones are much bigger....

Kev.