Alternative to Refresh Endura/Dry Eye Therapy - or any other castor oil drops?

[britgirl]

When my DES started a private eye doc prescribed me Refresh Endura (these were later renamed to Refresh Dry Eye Therapy). These drops contained castor oil and seemed to be the best drops for soothing my eyes.

However, they don't seem to be on the market any more.

Does anyone know an alternative drop with castor oil? (I'm in the UK, if that helps)