Railworks America

i have done a extensive search on google and have not turned any pages for downloading britkits buckeye couplers for us stock

Must have missed his site then.
http://stourbridge-lion.webplus.net/index.html
Unless for some reason this link doesn't work for you, the "Replacement Buckeye Couplers" link should be the one you want. . .

Read the answer on your other thread about this.