[TwinSting]

I am looking for some Wheel Vintiques steel wheels for a project and thought I would try to give my business to a supporting vendor here.
This is what I need:

15x10 5 on 5.5 (prefer not multi-pattern) #10-5005042
15x5 5 on 4.5 #10-551203
bullet caps #1027-1
I have seen these part numbers with a K on the end also. What does the K mean?

Thanks
Shaun