美国采购需求：沙滩车、全地形车、多用途全地形车、110cc全地形车、柴油多用途全地形车、四轮摩托车

I recently purchased a model from your lineup, and I've noticed that the rear folding seat is missing from the unit I received. This has created some inconvenience, as the seat is quite essential for my needs. I would greatly appreciate your assistance in getting a replacement seat. Could you please let me know if it's possible to order a new rear folding seat? Also, if you could provide details regarding the pricing, availability, and estimated delivery time, that would be super helpful. I'm looking forward to your prompt response so I can get this sorted out soon. Thanks!