Is this toilet fixable?

[Icelolly]

A builder installed this toilet and he’s long gone so I’m hoping someone can help advise with how I can fix it… the hole of the toilet wall unit has been badly cut. There are huge gaps all around. It was bought from Victorian plumbing and a new unit will cost £199 which I’d rather not spend if I don’t need to. Could anyone suggest how I might be able to fix this? Thank you all in advance.

 

[Wayners]

Cut and fit cover trim with silicone.

https://www.screwfix.com/p/rothley-white-plastic-flat-bar-1000mm-x-20mm-x-2mm/306jp