Your local recycling centre will have wheels like this (130mm OLN, rim brake, 559 dia ETRTO (all assumed)). Might have to buy the whole bike, but just take tools, strip anything else marginally worth it (by the car) and 'recycle' the bits you don't immediately.
Don't get hung up about the nut to QR change. Life is too short. and no rational thief will steal a QR (as opposed to nutted) wheel of this standard.
Also see the charity recycling thread with UK-wide list of places, as well as municipal sites.
And calling 1990s "vintage" - lol.