Manhole Cover

[Dontopenthetrapdoor]

I have an uncovered manhole in my garage (courtesy of the previous owners), it is an unusual size 660mm x 600mm and I'm struggling to source a cover for it. It's in an area that ideally I'd like to stand on often and I'm frightened of my 5 year old falling into it. Does anyone now if I can use a larger cover to cover it. As it is in my property I have been advised it is my responsibility to sort.

What about getting something like this that could be bolted to the concrete? It would be easier to cut to size with an angle grinder too

https://www.themetalstore.co.uk/products/mild-steel-walkway?utm_source=google&utm_medium=product_feed&utm_campaign=products&gclid=CjwKCAjw3POhBhBQEiwAqTCuBnZcHThmJlOyq_-CXDWlZgbOTw9_jo5NvG42JO4DLyexKGqHKV4GFhoC5OAQAvD_BwE

or a budget version, a heavy duty version of this type?
https://www.sure-green.com/welded-wire-panels-6ft-x-3ft-standard-1-holes.html?dfw_tracker=153358-WS1577&gclid=CjwKCAjw3POhBhBQEiwAqTCuBnJxjnJk6fow-v1AB3IVFib5rPrrwM26ClGA46I9fUBelSmSNpS2NRoCp-gQAvD_BwE

or else you would have to contact a steel fabricator or black smith to make something but that would be £££!
we had an inspection put in our last garage, so not quite that deep, but it had boards snugly slotted over it as there was a bit of a lip but you would have to get brackets or something screwed in in order to do that by the looks of it.

Thanks for your suggestions. I have found a blacksmith who is going to price me up something bespoke.