Looking for a changing bag to go with my pram *picture attatched*

Need a changing bag to go with my pram. I'm quite disappointed in Mothercare as there was a bag to match my pram but was out if stock at the time and I've found out that they are not restocking them. I've checked eBay, Amazon etc for one and I just can't get hold of one!

So now with only 7 weeks until my little man's arrival I'm desperate to get a bag to match my pram. Something that will fit on to the handle and not slide to the floor, similar colour etc. I really want to pack my boys hospital stuff soon but really don't want to fork out on a bag that won't be suitable!