I purchase many parts from tuner shops in Japan and rebadge the parts. This has always been stated on my website (read the top of the page) and I have always said that to anyone who had asked.
There are only 2 ways to make a solid subframe bushing, we went with the "300degree" style because it is easier to install than a long bushing. But 300degree was not the first with that style of bushing and there is an obvious difference with our design.