Barracuda 68 brake booster

Hi every one !
I have to replace the stock original midland brake booster that is fitted on my car ( factory front disc brakes and booster )
I did not manage to fia direct replacement part . it seems that we can find lots of kits to mount a booster on cars that did not come from the factory with one , but that they would not match the original set up
Would anyone have a solution for this issue ?
Thanks in advance for your support
Manu