I'll try to dig up the invoice. 
  
Okay, I found the GM Parts Direct invoice and the part numbers. 
  
10063145 - Hose assembly that runs from the engine to the one-way valve; List: $11.84, Net: $5.92 
  
10192799 - Hose assembly that runs from the one-way valve to the tank (reservoir) under the front fender; List: $12.02, Net: $6.00 
  
The one-way valve is included with one of the hose assemblies, but I can't remember which one. 
  
14056624 - Tank (Vacuum Reservoir); List: $18.18, Net: $9.09 
  
10456648 - Valve (One-way valve); List: $5.46, Net: $2.73 
  
Handling: $9.78 
Shipping: $6.59 
  
Keep in mind that these part numbers are for a 1992 Lumina, 3.1L and the prices are 09/2002 prices.  YMMV.