You can source the bits for do it yourself, I have had these in a watch list for years
UK links but I am sure US eBay will have the same stuff once you know what to get
neoprene https://www.ebay.co.uk/itm/373396396391?var=642416596195 wasn't sure what thickness though, 3-5mm, but I'd need to reference hunt.
rubber ribbing https://www.ebay.co.uk/itm/402300779926?var=672255164758
Then you'd need some black 50mm/2" webbing a clip and a couple of Chicago screws iirc.