Yes sir, right here at Bud's!
budsgunshop.com/product_info.php/products_id/11082/winchester+410+ga.+3+5+pellets+000+lead+buckshot

William, ask and you shall receive. Buds actually has some Winchester 410ga 3in 5 pellet in stock and ready to ship. If interested here's a link to it .................. budsgunshop.com/product_info.php/products_id/11082/winchester+410+ga.+3+5+pellets+000+lead+buckshot ................ If you want something different I use a website called ammoseek for my harder to find ammo. Just Google ammoseek and type in the caliber you're looking for and if any websites have any in stock it'll find it. You can also use the filter on ammoseek to look at different shot size, length and so on. Hope this helps.

William, several options (the one you seek) : budsgunshop.com/product_info.php/products_id/11082/winchester+410+ga.+3+5+pellets+000+lead+buckshot ---------------------- And optional slug / buck combo : midwayusa.com/product/1002086631