Any tool to merge my Amazon and Walmart gift lists?

Im honestly so over having to keep track of these two separate apps its driving me crazy. My sisters baby shower is coming up in literally three weeks and my family keeps asking where the official list is and I have to keep sending two links like a crazy person. I put all the diapers and the stroller and the basic nursery stuff on Walmart because honestly its cheaper there and my parents live in a small town in Ohio where Walmart is like the only store within 40 miles so it made sense for them to just go pick stuff up if they wanted to do it in person. But then Amazon has all the specific organic stuff and the cute clothes and that one specific white noise machine that Walmart just doesnt carry.

So I was thinking there has to be some kind of site where I can just pull everything into one page? My logic was that if I have one link it stops people from getting confused and buying the same thing twice which already happened with a pack of muslin blankets because my aunt didnt check both sites. I'm so frustrated because I spent like three hours yesterday trying to manually sync them and then stuff on Amazon went out of stock and I had to go back and fix it. Its such a mess and I feel like I am doing double the work for no reason.

I looked at Babylist but it seemed kind of complicated to set up if you already have the lists made and I really dont want to start over from scratch now. Im looking for something that just lets me import the URLs or something simple? My budget for the remaining big items is around 500 dollars so I really need to see whats left in one view so I dont overspend on the last minute gear myself. Does anyone know a tool that actually works for this or am I stuck just being the person who sends out five different links to everyone? Im just so tired of app switching and staring at my phone screens for hours trying to be organized...