M103 Spark Plugs... Everything Discontinued??

[350SL4spd]

Hey Guys,

I just went to get some spark plugs for the upcoming tune-up on my 1991 300E and was rather shocked to find no one makes them anymore . WTF?!?

Bosch no longer make a non-resistor copper core (H9DCO is gone). NGK no longer makes a non-resistor (BP5EFS is gone).

What is everyone running? Is there anywhere I missed that I might be able to get one of the above?

Thanks!

PS: I'm not looking to start another 'oil thread' here. I just need plugs for my car and want to stay as close to stock as possible.