Hello ROYS1408,   This is the part number for the Butterfly riser: Part #:3WNVY Part Desc.:ASSY,MECH,RSR,BTFLY,R250/R350  
Hi, Does anyone know the P/N for the R250 butterfly riser? Why are Dell P/N so hard to find!     Thanks Roy    
R250 Butterfly Riser Board P/N