My pre he has stainless wiper arms.

https://www.ebay.co.uk/itm/NEW-JAGUAR-XJS-WIPER-BLADES-ORIGINAL-TRICO/162167081562?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649

Here is an eBay link to the blades and holders but I’m afraid you’ll have to try some jag spares for the arms.