I see what you mean about the NAPA link I posted.Sorry about that. Anyway most of the NAPA numbers are online.Here are the NAPA numbers they can look up for the plugs.By the way, they are listed under their CYLINDER BLOCK parts category.
Expansion Block End Plug 2" Steel #SEP3813041
Expansion Block Side Plug 1 5/8" Steel #SEP3813097
Expansion Block End Plug 2" Brass #SEP 3819001
They have no number listed for the 1 5/8" Block Side Brass Plug, but I'm wondering if it's actually the number NAPA has for the 2" Brass Plug,since I always thought the end plugs were always steel.I usually have no trouble getting NAPA parts if I can help them with the number.Short of that any independent parts store that provides parts to repair shops in your area should have the numbers.
