Radio tool?

[z32]

Hey guys, i need to take my factory radio out to get the serial number off the back.
The two bolts holding the radio in have a 5 pointed star shaped end, kinda like a torx, but 5 instead of six points.

Where did you guys buy this special tool?
thanks

[SchnellerVert]

Google BMW radio removal tool. Many places have it.

[z32]

thanks

[atomic]

https://www.bavauto.com

they are like $16.00

[eyagel]

i got away with using a allen wrench, someitmes if they arent incredibly tight you can use just a regular allen, but not sure about the size.