4-Wheel Truck Availability

[Len]

Any idea when the 4-wheel geared truck with coupler will be available again?
https://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=77_219&products_id=9627&zenid=bm5v5apsihk3lvps8dhpeoncl1

Several of the GP-9's used on the display layout I maintain at the shopping center are down due to worn out brass drive gears. So they are out of service until I can replace the trucks, which means even more wear on the locos that can't be rotated out for routine service.

Len