HELP ..Need a Vacuum booster..

Ok guys, I'm sorry I didn't get bask sooner,
The mechanic has verified that the vacuum booster is shot, in fact he said he could have fixed if I got the diaphragm for it but I can't find squat let alone a diagram for the booster.
The brakes are super hard now and the vacuum loss is making the engine run shyt....
This is where I'm at now.
Thanks
MAPS

P.S. Mind you I'm still driving the car but it's phukken running rich and I'm worried of gas wash on the engine... This is why I want to fix it asap.