Thank you for your question.
My search returned the following results:
Cascade Equipment offers an extensive inventory of factory new parts
for Honda, Yamaha and Kawasaki motorcycles of the '60s, '70s and early
'80s. Whether you're rebuilding the classic of your dreams or just
trying to keep it going, let us help you find the missing piece.
Cascade Equipment, Inc.
Montrose, Co 81402-0352
Cascade Equipment Website
At Moped World they have a handy Honda Parts Inquiry Form to inquire
for the part you require.
Moped World Website
Parts and Accessories
At the following websites you would have to ask about the specific
part and model.
Direct Parts Website
Cycle Parts Website
At TLC MOTORCYCLES PARTS AND REPAIRS they state ...we have the
largest inventory of used motorcycle parts west of California and east
of Japan. Just tell us what parts you need and if we don't have them,
we'll do our best to find them. CAN'T FIX YOUR BIKE? E-mail your
problem to us. Maybe we can help.
An online order form is also available there.
TLC Motorcycles Website
Daves Cycle has a partial list of some of the used part they have for
sale. You can order online.
1978 NC50 Honda Express Lots of good used parts here (Orange)
E-mail for prices firstname.lastname@example.org
Dave's Cycle Webpage
Here is a list of classified ads where they are selling parts for the
1978 Honda Express.
For Sale - 1978 Honda PA50 parts
I have some PA50 parts for sale.
MC Mart Website
1978 and 1979 honda express parts and puch moped parts for sale good
Waynesville Cycle Website
The Honda Express Manual is available for ordering online at the
Honda Shop Manual
NA50 Express II
Expressly Mopeds Website
HONDA Repair Manual
NA 50, NC 50 Express Mopeds 60-85
International shipping available.
Ellery Publications Website
Additional links that may interest you:
HONDA EXPRESS TIPS
I hope this information has been helpful.