i'll simply point you to all the links above, and the search button in the upper right hand corner of your window. They all will allow you to find out where you can get an accumulator from.
Though it appears you are completely unaware of if you even need one.
The SC motor generates plenty of vacuum. The 93+ Coupes use a vacuum powered brake booster for assist, unlike the earlier units. There is plenty of vacuum. You just need to find it at the throttle body. (The cruise control receives it's vacuum from somewhere as well.)
All of this has been discussed before in various threads you have started and people have answered for you.