Another 360 to 904 question

Hello A-body guys. I was advised to come here with a question I have about installing a 360/904 combo in my 65 Valiant by a member of another forum. I am using the 65 cable shifted 904 behind a 72 360. I have the correct flex plate(finally) and am now looking for an "annular ring" or spacer ring that allows the stock torque converter hub to fit the 360 crank register. Wildcat auto used to sell them but wildcat hasn't been around for awhile. I am hoping some one here knows where I can purchase one at. Thanks for you help