Had a look online and found this which seems to be the part but £42 for a plastic door handle?!?
TBH, the unit is a good 8 years or more old, and will probably need replacing before too long as the freezer ices up badly and the whole thing is looking a bit worse for wear, but until it actually conks out, we'll keep it going even if it means taking the handle off the freezer we keep the dog food in in the garage. It's white not silver and would end up upside down, but certainly not paying £42 to get a new handle!