I have the whole setup of Ryobi stuff. I just Got a Makita setup for christmas. I have the drill, recip saw, circ saw, flashlight, caulk gun and 4 batteries. The caulk gun works great! Send me a PM and we can talk breaking the setup, or buying all together. If. I sell the charger and batts, the rest is useless so I may as well through it all in. let me know.
Ebay is probably you're best for finding one. I have one (not for sale) which I only used for construction adhesive and caulking my shed...worked great for that!