HI Pecks, You Sure Have been having some bad luck with your lights.
Good to know you`ve got a dealer that keeps changing them without saying .."Its just Normal wear & tear", UnLike Obehave`s

(What did they charge for replacement Obehave??)
What exactly is the Fault you experience when turning right & Flashing ..& does it also do it when the car is stationary ??
How much are the Hella ones, & is it a simple matter of unbolting the Original Rusty ones & a straightforward Bolt on Job using the existing New Loom cable & Bracketry ??