Roof air vent blanking plate

Hello everyone, new on here looking for an answer? Just bought 07 def90 looks like it started out commercial and has a rotating air vent on roof, don’t really need or like it and it doesn’t fit in the garage!! Wondering if I take it off where can I get a blanking plate for the hole???? Any idea?
Thanks

It'll stop any ply lining rotting if it gets wet. Just mastick/rivet a suitable size plate to blank it.

goonarmy said:

It'll stop any ply lining rotting if it gets wet. Just mastick/rivet a suitable size plate to blank it.

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Thanks, was hoping there might be a product out there rather than the DIY repair...