Focussing hood for Ebony RSW45

I am trying to find a focussing back for my RSW45 so I can get away with not using a big dark cloth in the wind (super annoying)

I bought a Linhof one but it doesn't fit, I guess it's for a Graflok back, which the Ebony does not have.

Does anyone know of a (preferably folding) focussing hood that fits Ebony backs?
I know Ebony's own one, but it seems to be non existant..

Thanks for you help

Are you still looking for a focusing back for a 4x5 Ebony camera? If yes, I may have what you are looking for. Send an email address and I will send a picture and a price.