5 door and 3 door shelves do differ - I have a 60 plate 1.4 SE Copa Shelf in my Boca
If its for a 3 door - You should be fine.
whats happened to your shelf? split where the clips snap?
mine did it and split the sides but once i replaced the clips it holds it all together perfect and i just put a tiny bit of glue on the inside of the crack and cant even notice it and cost me £3 for 2 new clips much cheaper than new shelf
My shelf has been in my loft for 3 years.