I bought one recently, Vaico V24-0293, but it was not correct, despite the listing confirming it as supposedly correct. It is still listed by various eBay sellers and GSF for example (from whom I bought it for about half what it says now, but got a full refund), but it is not correct. At the time I bought it, AutoDoc and their various "clone" sites also said it was correct, and all of the sites showed a fairly poor quality picture that made me think it was correct, and I thought it was worth a punt in case it did fit.
AutoDoc now show a Triclo one
instead, still with a fairly poor picture, but it may still be a similar non-fitting version. Some web sites say it will fit, others say it won't. If the price is low enough and you can get a refund without wasting any (or too much) money, then again it may be worth a punt...
There's a better pic of the Triclo one here: eBay
what do you think? It could also be a case of "Honey I shrunk the coolant reservoir"
If you can get the seller to confirm dimensions and provide better pictures you may get lucky...if so, do share it with us!
Although cleaning the old tanks will help, the plastic goes yellow with age...