Can anyone help. I need to replace the part below. It's from the rear drivers side window. It's part of the frame that sits beneath the window / supports the glass and connects to the power window mechanism. Anyone know what its called and where I might be able to get one?

Channel Rear Door Glass Lift... maybe, shown as #26 in the link below
https://allbrit.de/epc.cfm?PAGE=C01220&CAR=L4&SPRACHE=EN
Then Google for the part number and a supplier