X-Trainer Shock seal head help needed

[Dava123]

Hi I’m rebuilding a X-Trainer rear shock and I’m struggling to find a new seal head for it .

Does anyone know of any UK based company who will stock a new seal head for the RI6V shock the size is 16x40 which is a strange size .

Failing that does anyone know of any UK based company who may stock a main oil seal for inside the seal head the size is 16x24x5.5

Thanks