If you prefer delivery or are looking for specific DIY tools (like molds), these platforms have wide availability: Concrete Splash Blocks - Gutter & Downspout Splash Blocks

: Sells heavy-duty splash blocks through a network of local dealers across the Eastern U.S. (PA, NY, VA, MD, etc.) or via their online store.

: Similar to Lowe's, they carry various weights and sizes in-store. Specialized Masonry & Supply Companies

: Stocks concrete splash blocks frequently priced around $13.39.

: Stocks multiple sizes ranging from standard 24-inch blocks to large 60-inch commercial options. Online Marketplaces

These stores are the most common source for standard concrete splash blocks. They typically stock them in the garden or gutter aisles.

For higher-quality, heavier, or more decorative options, specialized masonry manufacturers offer more durable concrete products.