I strongly suspect the Gold Seal attachable breastplate is produced by a manufacturer in San Diego that has advertised on CDH in the recent past. I won’t say who it is to avoid a visit from the CDH police. If I’m correct, the same breastplate can be bought direct for substantially less. It shouldn’t be very difficult for a motivated girl to find their website.
I have met the guy that runs this company. He has a ton of experience doing special effects makeup/prosthetics for the motion picture industry. His work is fantastic. He used to work for another San Diego company that produced the RealBreast brand of breast forms. They were widely regarded as the best you could buy anywhere, being nearly indistinguishable from real breasts, hence the name. RealBreast stopped production for unknown reasons a couple of years ago.