Top pad for front bumper?
 

Does anyone know where to get the top pad and bumper guards for the 91-93 models?Also where to get the Dodge lettering for 91-93 grilles?

This place may have an aftermarket version. http://www.certifit.com/t-storeProducts.aspx
The only other alternative would be a dealer but most of them won't help with older model vehicles.
You might try EBAY or contact the person who runs this site.
http://www.mopartruckparts.com/