You don't say if this is for a dessert sauce or to be served with meat of some type.

You may be able to take the sauce ingredients in this recipe, double or triple them and cook in a slow cooker. You also do not say if the sauce is too be served over/with a dessert or if you want to can or freeze the sauce. We need more information in order to help you.

Here is a link that might be useful: Cornish Hen with Cherry Sauce recipe