I can't work out my diplomat oven model?

We moved into a house with an oven in it already. We have looked at the back, inside the door etc and cannot find a model number anywhere!!! We think the element has gone but can't work out the model number to order a part.

It is I guess ornate? Has fancy nobs and the Front door has an arch to it. Ours is green with gold nobs but It looks like this one...

http://www.gumtree.com/p/for-sale/for-sale-diplomat-stainless-steel-built-in-fan-oven/95519384

Can anyone help I'm struggling without it

Cheers

J