139,7 mm x 158,75 mm x 12,7 mm INA CSXU 055.2RS angular contact ball bearings

How do I place an EMERGENCY order 139,7 mm x 158,75 mm x 12,7 mm for a 139,7 mm x 158,75 mm x 12,7 mm INA CSXU 055.2RS angular contact ball bearings that 80.0000 mm D I want to pick NTN Driveshaft CORP. Two Shields Accessories up at a our store?

What is CSXU 055.2RS bearing interchange？