For sale is a bearing kit for VP Components Bicycle headset. These will fit headsets:

VP-T501AM
VP-T501AC

These are 1-1/2” upper and lower headset.  Bearings only, not full headset. 

This includes 2 x sealed bearings for the upper and lower headset cups.

2 x MH-P25K sealed bearings
Also Known as MH-P25KM / MH-P25
40x52x6.5 36/45
Inside Diameter:  40.00mm
Outside Diameter:  52.00mm
Width:  6.50mm
Seals or Shields:  Rubber Seals
Clearance:  Standard
Headset Chamfer:  36° / 45°

These are quality bearings from a selected supplier, not VP branded but these are direct replacement for VP bearings
.