Partial grill element failure on Electrolux EOB966W oven?

Hello,

I have an Electrolux fan oven, the grill of which has partially broken down.

I have watched it whilst heating and only the outer ring is heating up, not the inner ring.

I have researched spares and wondered whether the inner ring can be purchased without the outer part as I could not find them?

Is this something that a professional needs to do or is it fairly easy?

Would I need to pull out the oven to make the repair (integrated)?

Any help would be appreciated. Thank you