Just a thought, I was looking for a neck cover for a different model of WB and one of the suppliers I called up pointed out that if I found a similar type very cheaply it wouldn't cost much to get the fixings moved. This one had rings and clips obviously wouldn't work for any zip type arrangement.
So I bought the first neck I saw for about £6 on ebay thinking I could get them moved and in the end the clips were in the right place so didn't need altering.