Door Molding help

[CAROLINA CUMMINS]

Hey guys,

I need 1 piece of door molding for my passenger side door. I found it here but cannot figure out which item I need. When I click on part #3 in the illustration it shows 4 parts, what is the difference between the "lower right" and the "belt w/strip" ????

http://www.moparpartsamerica.com/partlocator/index.cfm?action=getJointLocator&siteid=214583&chapter=&Sectionids=0,3263&groupid=2724&subgroupid=2738&componentid=2887&make=8&model=D/W%20250%20Pickup&year=1991&graphicID=TA90290&callout=3&catalogid=2&displayCatalogid=2

ya'll might know where there is a better place to get this stuff, i'm open to suggestions, thanks

Steven