Capri V6 Universal Joint Cap Dia

[Aether]

Hi guys

Just need some quick help from someone with a V6 Capri. I ordered some universal joints and they arrived but they dont fit. The guy is telling me that mine must be imported or something but I think he is just trying to avoid paying for the return shipping. Can anyone confirm the cap diameter? The old ones I removed had a diameter of 28mm and the ones he sent are 25.4mm / 1inch.

Ive measured it like 15 times and for sure its 28mm

Any help appreciated. My service manual and other ebay listings dont mention the diameter. You would think they would...