The golf club was bought from goodwill for a little over $2.
The paint roller was bought from Lowes for about $3 to $4. I cut off the plastic grip with a dremel tool.
The dremel tool was also used to cut the head off of the club. This led the club to be 39.5 inches in length.
The end of the paint roller fit nicely into the golf club, and some JB Weld ($5?) was used to stick it all together.
After a little under 24 hours of drying, the stick (now just under 46.5 inches) was ready to use. It's study, and can flip rocks with ease.