In a chiltons repair manual for 72 dodges.
go to the library and get a chiltons repair manual for your car.
go to manheimgold.com and figure out the price.
auto swap meets you can find ads and manuals and look on you tube for old commercials.
Any good parts store should be able to get the push rods for you and if they can't try Manciniracing.com.
if you are lucky to live next to a pull-a-part you can sometimes find one there. If all else fails try one of the Mopar shows like they have at Bristol TN.
go to the library and get a chiltons repair manual for your car.
Autozone web page has the Vacuum diagram for the1989 Dodge Dakota.
you can try manciniracing.com.
look on the internet as their are companies that will custom make weatherstrip for you.
E-bay, craigslist, or a local swap meet.
You can find a vacuum line diagram for a 1989 Dodge Dakota by checking the owner's manual. You can also find them at different auto part retail stores.
with your mouth
If you can even find them they are big money.
go to manheimgold.com and figure out the price.
try NAPA or any parts store.
Chiltons service manual
I'm sure you could if you can find the parts you need and have the experience to do it.