The RX-1500 was sold in fairly large numbers in the EU, so 220V versions are not that rare although prices are steadily on the rise. The RX-5000 is much harder to find in EU voltage. Of the really big air bearing models like SX-8000 mk II only a handful 220V versions were apparently imported. If offered at all, your 20k budget won’t be enough.
Another option might be to check www.micro-seiki.nl or www.db-tribute.nl and look for The Tribute. This is a meticulously built one-on-one replica of the RX-5000 that can be sold together with a newly designed motor drive made by Dereneville in a chassis similar to the RY-5500 motor drive. Should be easily possible within your budget. On this site you will also find some of the add-on accessories, like the copper mat and even a replica of the HS-80 flywheel. The guy who runs this business is great to deal with, a real fanatic when it comes to quality and very customer friendly.
unfortunately my Finite Elemente Pagode HD Wallmount can’t handle the total weight of the Tribute, otherwise this would surely have been my ‘last table’.