Here's what you need:
Yes...you can somehow make the honeycomb fit into the stock XL/ XLT 2wd shell.....but i'd suggest just getting a 4x4 XLT/EDGE grille assembly(both the honeycomb and the "shell". It's a direct swap...with NO problems.
This is a good, reputable place to get parts....i love LMC truck. I've probably bought over $3000 of parts for my chevy from them.
The pic shows the differences between the two style grilles.....Your current grille, is referred to as a "closed" grille because the top is closed. And the 4x4 XLT/EDGE grilles are referred to as "open" because the top is open. I believe that the XL/2wd XLT grilles are the same width and same bevels as the honeycomb....but not exactly sure.