I usually get mine here... they are very reasonable, she is a YT member:
2Parises Shop Comfortable Casual Style by 2Parises on Etsy[]=tags&includes[]=title
Also YT member "107barney" makes bellybands and nice, soft reusable inserts called "bumpkins barriers"... I was using regular pads to line the bellybands but I just ordered some of these because they are softer and cause less irritation.