Wanted: Full scale muzzle loading cannons

Just your average collector looking for just your average antique or reproduction full scale cannon and/or cannon barrel. Can be genuine antique or modern reproduction. Only condition is it has to be fuse/match ignition and muzzle loading, so no breach loading/centre fire. Looking for three inch bore or larger.  So go check your garage and backyard colonial era fortification for one lying around. Any condition will be considered. Fully rusted and barley hanging on there to as-new repro. Curious what might be out there and have cash in hand to find out