Looking for parts for my 72 Dart

Of course I'm a day late and a buck short cause what i've been looking for seem like they recently got sold. I'm attempting to build a pro/street 72 Dart racer i can drive on the street.

What I need
- 489 8 3/4 case - I need to build a rearend unless someone has one ready to mount with 3.91-4.10 gears..unlikely so I'll probably have to build one.

- Front disc brakes setup

What I want
- front bench seat for 72 dart

- small block roller rockers

I know a ballpark that these have been selling at unless it's a ready to go rearend in which price changes dramatically of course. I'm located in Allen, TX 75002 if you need shipping quotes. I appreciate it in advance. Thankyou, Nate