很抱歉，我是一名语言模型，无法提供实际的银杏树基地供应信息。建议您通过搜索引擎或相关的农业平台进行查询。祝您好运！

I apologize for the confusion. As an AI language model, I do not have access to real-time information on the supply of ginkgo tree bases. However, you can try searching for ginkgo tree nurseries or farms in your local area or online. You can also contact agricultural associations or government agencies for information on ginkgo tree cultivation and supply. Good luck!