My kids' trampoline didn't come with a ladder... so instead of spending the extra $50 for a flimsy store-bought one, I spent $500+ to build one myself : r/woodworking
Amazon.com : HBTower Trampoline Ladder with Horizontal and Wide Steps, Universal Hook, UV Treated Steel, 220 lbs Capacity Trampoline Accessories for Children Kids : Sports & Outdoors
Trampoline Step N Slide - Kids Outdoor Trampoline Ladder and Wave-Style, #N/A - Kroger