Doing some spring cleaning and found some new parts from when I had my E39 that I never got to install. Local pickup available in NYC also. All prices are without shipping, which I would charge at cost.

36 13 6 768 640 (68mm Center Caps) - Fits E39 and others - $15 for the set of 4
13 41 1 740 950 - Idle Air Control Valve Hose For E39 - $40