Not sure if this has been suggested but what about https://www.amazon.co.uk/gp/product/B006XOBFJC/?tag=pinkfishmedia-21
It comes highly recommended and is not super-expensive. I'm listening to it at the moment.
That cycle is included in the "Wagner - Great Recordings" 40CD box set. Tony has one for sale at the moment:
"Wagner - Great Recordings, huge 40xCD box on Sony including complete Ring Cycle etc, absolutely mint and far too much Wagner for £30.00."
Otherwise Amazon at ~ £35 ish
https://www.amazon.co.uk/dp/B00A2JTEHY/?tag=pinkfishmedia-21
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