Where to find replacment tube for antique thermometer?

To find a replacement tube for an antique thermometer, first check specialty antique shops or online marketplaces like eBay and Etsy, where collectors might sell parts. Additionally, consider reaching out to local restoration experts or antique repair services, as they may have access to replacement parts or be able to fabricate a suitable tube. Online forums dedicated to antique collecting can also be a valuable resource for advice and leads.