sharkfin antenna cover

looking on google for a sharkfin antenna cover for the bk1 but I can’t find anything solid, keep seeing stuff on how it says it’ll fit but won’t, local pick a part doesn’t have it and I feel like I looked good online, did a bit of research and I think bk1&2 are universal but please correct me if I’m wrong. Not interested in buying the electronics I just don’t like the ugly circuit board on the top and want to cover it back up. currently covered up with duct tape thanks for any and all help