Leckey Squiggles stroller

This chair has a 9″ x 9″ seat, with depth adjustable to 12″, and adjustable back height 11″ to 14″ plus head rest. BUT it is something of a hybrid, with assembled spare parts.  There are no laterals we can find to fit, though we have lots of them.   It has a belly band and a pelvic positioner, but no chest harness.   Activity tray with stroller base.