Old post I know, but in case anyone was still looking NRS offers them now, as does strapworks.
http://www.strapworks.com/ProductDetails.asp?ProductCode=LSCB112H&gclid=Cj0KEQiAk5zEBRD9lfno2dek0tsBEiQAWVKyuBj_qkpfOf-W-_SBHclarJ4AXPJcp9yQWIQlfWQZMbMaApmK8P8HAQ...