Tricky part there is that the catalogs do not have a uniform measurement in the specified length of the cannon, some include the cascabel, others do not.
Then, there is the issue that not all cannons are the same shape or length, and "scale" very poorly--a 1/48 12pdr is not a 1/96 24pdr.
Order the least quantity you can at first, until you find the pattern you like best.
Bluejacket probably has the best "scaled" 1/96 Connie armament, but, you'll still have to clean some seams, as those are cast britannia metal. But, the carronades (the most visible weapons) will be right-sized. Britainnia metal can also be chemically blackened, which can look better than paint, too.
Note, replacing the cannon barrels introduces another bugaboo, cannon carriages are tapered to match the cannon. The kit's carriages are relentlessly parallel, and once you know this, will sore annoy, too. This can be corrected, but it is as tedious as cleaning seams on all those cannon, too.