Just make another one out of A/C 1/2" plywood and glue a piece of 2" blue foam to it.
Unless you have an attic that was designed for storage it's not worth the hundreds of dollars if not more for an insulated attic stair.
E-Z Hatch attic access door might be what you are looking for.
The E-Z Hatch R-42 Attic Access Door is a high-performance energy-efficient attic access scuttle door. It is R-42, triple-gasketed, pre-finished, and provides a 22x30” access opening. It is an energy efficient alternative to energy wasting attic pull down ladders, and exceeds all Code requirements. The Deluxe version is provided with a 4-point lock and handles. A step ladder is used to provide attic access. Cost is about $199. Available from Battic Door, www.batticdoor.com