I have aquired a badly sporterized no4 mk1 with a shortened barrel and cut down forestock. I would like to convert it into a mock no5 jungle carbine, but i cannot find a conversion kit other than the one offered by numrich, which has been out of stock for quite some time. I have contacted the company and they are unsure if or when they will be getting in new stock. Any advice into how i could aquire this kit would be much appreciated.