E46 locking gas cap for use inside the central locking flap?

Google didn't help (at least not in my time allotment). In case you didn't know it, a thief can insert a pry tool (popsicle stick?) and pry back the plunge pin that locks your gas tank flap, open the flap (yes, even with the car locked), and thereafter of course, simply open your gas tank. I recently came out in the AM to find my car locked, but the flap open...over 1/2 tank of gas stolen this way from my E46 M3. At $4/gallon for hi-test, look for it to happen to you next, if not to me again.

Nowhere have I been able to find a cap with the green insert shape that also has key lock feature. Does anyone know of a source? Thanks!

I don't see one on realoem.com. Will try to remember to look on the ETK at the office.

Guessing that you didn't turn anything up. Anyone else? Am I the only one to lose gasoline from someone applying a five finger discount??

No, I didn't see a locking cap for the E46. I have them for the 2002 and E28.