1993 Audi Cabrio leeking hood Resovoir

[quattro25years]

hi , my resovoir thats holds the hydraulic fluid (in the boot of the car) has leaked (noticed a small split in resovoir) , fluid level has dropped and therefore roof will not raise or lower.

Does anyone have the part number / title of the "plastic resovoir and the best place to buy one.

thanks for your help!