Their catalogue doesn't show a different part number for the sliding door so i'd assume that it would fit. I can let you have one if you only want one, i'll find out postage for you tomorrow.
Sorry i completely forgot about this. I'm away now until mid August, when i get home i'll find out a price and Email you both if your still interested.
You've both got PM. Royal mail will post for £4.41 standard parcels or £4.90 first class for 1 seal or both seals would be £7.62 standard or £8.95 first class.