Yes, Samba's vfs_fruit module (which has options for better interoperability with Mac OS) has the fruit:model setting lets you select which icon it will show up as. You can make it look like any Mac model or Apple TV or iPhones etc.

Setting it to the string RackMac or Xserve should get that icon.

Somebody pulled all the icons and their codes out here: https://callumgare.github.io/macos-device-icons/