You can find office supplies at various online and physical retailers offering a wide range of products:

• TU-Darmstadt Online-Shop offers office supplies such as pens, folders, lanyards, and other stationery items with options to buy directly online

• Modulor in Berlin provides high-quality office supplies available for online purchase

• Manufactum offers a selection of high-quality office supplies including stationery, organization tools, and office furniture

• Karton.eu sells all office supplies including envelopes and other essentials with fast delivery and online ordering

• Walmart.com has a comprehensive range of office supplies including paper, ink, pens, staplers, and more, with options for fast delivery and bulk buying

• MAUL.de is a German manufacturer providing professional office products like pen holders, filing and storage, calculators, and more, available online

• Conrad Electronic offers a large selection of office supplies including consumables, technology, and furnishings, suitable for various office needs

• DURABLE provides professional office equipment and workplace organization products with a focus on quality and functionality

Depending on your location and specific needs, these sources can supply everything from basic stationery to specialized office equipment. For convenience and variety, large online retailers like Walmart and Conrad are good options, while specialized suppliers like DURABLE and MAUL offer professional-grade products