Hello there , if I remember correctly the 480 engines where based on 1.7 & 2.0 Renault engines that used a common engine block . It may well be worth asking on a Renault forum / specialist Renault breakers for the covers you want .
You could also try
https://www.huddersfieldvolvobreakers.co.uk/
https://www.thescrappers.co.uk/volvo-breakers/
Hope this helps you