Your search for "UNIV-250W-PS-AC" revealed the following:
Juniper UNIV-250W-PS-AC NSMXpress 250W AC Power Supply
SKU: NSB-0362
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Juniper UNIV-250W-PS-AC NSMXpress 250W AC Power Supply
SKU: NSN-6596
Condition: New
Shipping: Overnight Options
Warranty: 365 days