Lead time for product not in stock is 9 to 11 weeks for Hytrol to fabricate.
4 in diameter pulley with extended shaft for the sprocket to be mounted. The pulley face is fully lagged.
Item #9 on page 13 in the Maintenance Manual for TA
Lead time is 10 business days.
Bearings for this drive pulley can be purchased here
Drive sprocket for this drive pulley can be purchased here