Front hub bearing grease cap

[sharpandroid]

I got some front wheel bearing grease caps from rock auto, they're too small, although they were on the right menu for the car.
Does anyone know where to get the right size ones.
They are about 1 3/4" on mine.
rock auto lists 1 9/16 as the right size.
Would 45mm caps fit.
Thanks.

[sharpandroid]

I solved the problem myself.

The cap is 1.78 inches, it's a Dorman part 618101 (13975)

Ordered 2 from RockAuto, £5.94 plus the delivery and tax.