Wilcox Crittenden Seacock question

[rdowall]

I have a 2 Wilcox Crittenden 1-1/2" seacocks that I would like to rebuild. These seacocks are 1995 vintage and have rubber 'O' rings at either end of the tapered plug. I can't find replacemets for the 'o' rings and I wonder if they are even necessary? Ideas/suggestions?

See attached photos

 

[ggrizzard]

Don't see your photos, but Buna O rings (online) has every size known to man. You have to buy a bunch, but the cost is minimal by comparison to buying new sea cocks.