Where to buy large universal raincover

[HopefulBeckie]

I have a Joie pushchair and my not long turned 2 year old is too big for the raincover. I was wondering if anyone has any ideas on where I can get a large one so his legs and feet don’t get wet.

Amazon and ebay tend to have a massive range or if you actually wanted to go in store- smyths has a baby section with accessories etc so will probably have one there