Help me find a cushion that fits this high chair!

[MrsJamin]

Hi I have recently purchased a Hauck Alpha highchair but the only cushions I can find that fit it are nasty Winnie-the-pooh ones (could rant about how much I hate the Winnie-the-pooh-isation of babyhood but I will contain myself).

Would a babydan cushion fit it? Or could I make my own cushion out of something? Ideas would be very welcome!

which bit needs cushioning?
assuming it's just the back bars (nappy takes care of the seat) it should be fairly simple to make or adapt something

or the Ikea inflate-o-cushion would bend to fit

I guess it's just the back really. Going to do BLW so DS might be sitting in it for some time! The cushion to the antilop looks like a good option as I could just wipe it down rather than having to wash it. Very cheap too!