Mercedes Benz Relay for fuel pump

[paulnw]

Hi, just registered as my trusty 16yr old mercedes c180 kompressor needs a new relay for the fuel pump.

I have been searching the internet for the last hour trying to find a new replacement but I can only find used ones and ideally I would like a new one.

The part number is 4RA 007 913-00. Its made by Hella and has 12V and 20A above the part number and its 4 pin.

I suspect its been superseded by another part number but I don't know what that could be.

I've attached a couple of photos.

Any help would be gratefully received.

thanks

Paul