Aprilia mirrors and Adventure Tech extenders
To the genius (s) who put Aprilia mirrors on the V-strom, thanks! I installed the mirrors on the Adventure Tech mirror extenders and they work great. The airflow is now laminar, and sometimes "busy" but no longer turbulent. The mirrors screw directly into the extenders: Remove the stock mirrors along with the upper cinch nut and lower male stud nut. Screw the Aprilias directly into the base and use the installed Aprilia cinch nut to tighten. Voila!
I bought a pair on Ebay for $19 from a guy in Hong Kong and they were delivered in a week, and they work great. The view is a bit less than stock, but with adjustment they do the job.