Lightroom :: 4.2 - How To Get Crisp Graphical Identity Plate On Prints

I'm a long time LR user (currently LR 4.2), but just recently started producing a series of limited edition prints that include a graphical identity plate centered below the image.  As LR insists on having to scale the identity plate, the result is that I can never produce a print where the text appears crisp and sharp.  Rather there's always some perceptible softness in the text.
 
I'm using PhotoShop to produce the graphical identity plate and have produced it in the exact dimensions as it should appear beneath the print.  When I bring it into the LR print module, however, it immediately scales it to 100% of the page size so I'm left with no option but to select a scaling % that most closely represents the original size.
 
Is there a solution to this?  I only recently purchased PS CS6 and am thinking I should probably be doing this within that application, but honestly I'm just more comfortable in LR.  For this print, I have the page size set to 20" x 30" and the cell size containing the image at 16" x 24".  I think I know the correct process to duplicate this within Photoshop, but verify the procedure if LR isn't up to the task.