Transmission Fluid for Electric Roof no longer exists, what can I use instead?

[Kim Booth]

I have a 1987 Escort Cabriolet Ghia which needs me top up the transmission fluid for the electric roof to operate. The manual tells me I need to use part number 1661100 however that part number no longer exists, and Ford's parts department cannot suggest any other fluid I can use instead. Does anyone have any idea what I can use instead?

Sorry this is the 2nd time for me to post this question but I cannot find my original question on ths site now so am unsure if it got posted or not. If possible, and suggestions would be gratefully received on my email accout kim_booth@hotmail.com. Thank you so much. I'd be so very grateful for any suggestions anyone has.

[Vincygav]

If you check the search, there are a lot of other fluids many use. I believe they are mineral based