I need a carriage for mountain howitzer golf ball cannon...https://brooks-usa.com/gallery/
No you don't, A Ten PDR is to huge, if you can find one.
Get one of Brooks "Inch" Napoleons and have Mike Elledge build you a carriage.
Or for just a yard ornament get one of Elledge's 6 PDR Cement Yard Cannon. These things are huge.
http://www.jmelledge.com/CementCannon1841SixPounder.html