The deadbolt guide (door side) on my door fell out and made it really difficult to lock since it wasn't aligning with the the deadbolt slot (frame side).

Whipped together a quick OnShape model and it worked wonderfully. It prints without any supports and with a 0.6mm nozzle finishes in around 7 minutes.

If you need to adjust sizing, grab a copy of the OnShape model: Round Drive-In Faceplate. 

Reference Images
	Without the guide, the deadbolt would turn sideways.  This would cause it to become misaligned with the slot on the frame and make locking the door difficult.
	Now it aligns perfectly and adds a fun splash of color!