For your consideration;
H/D parts are sold from U.S. distributors, Triumph is shipped from over-seas.
My replacement America bare casting head was $1,500.00 part only. No aftermarket alternative.
Triumph CDI, $640.00. Pro-com, $220.
Triumph coil, $140. Aftermarket, $70.
Triumph key blanks (two), $56.00. Arrow locksmith (two), $4.00
Where are your direct comparisons?

Show me ANY aftermarket part that cost MORE than OEM.