Dlumeryard (https://www.dlumberyard.com/cannons.html) and Syren Ship Model Company sell them (https://www.syrenshipmodelcompany.com/laser-cut-ship-model-fittings.php) I'm not sure if the size/style would fit your San Felipe. Good luck.does any member know where i can buy cannon kits with the blocks included for the wheels? i would like complete carriages kits for the san felippe model. thanks terry