Our Wylie is blind and hasn't been able to go for walks for quite a while now, which I feel so bad about

.
I was thinking maybe we could buy a sling and carry him along when we do walks. I tried one from Amazon but maybe it wasn't big enough, plus he was very squirmy and didn't seem to find a "lounge-y" position that worked...so I returned it.
I don't really want to get a stroller btw, would just prefer some sort of carrier where I'd be hands free to walk another dog or 2.
Any recommendations? Thanks all!