[Spridgets] rear hub question

[George]

While fixing a rear axle seal leak I discovered that I don't seem to have
the correct hubs.  My parts book says I should have 2A7087 hubs and I have 
2A7088 hubs.  The profile appears wrong for the seals that I have.

Three questions:
Any problem with using the 2A7088 hubs on my sprite?
Who makes a good 2A7087 hub?
What was the 2A7088 used on?

George Castleberry
59 AN5
54 BN1
Flagstaff, AZ