cannot help you with a part number - have no resources. Retried from the lift truck business 12 years a go. But during my career I worked with BT-Prime Mover from 1996 to 2001 in a sales/marketing capacity.
Maybe some one can help. But remember BT-Prime Mover co & line no longer exists so sourcing may not be so easy. here is a link for you to read
www (dot) mhlnews (dot) com/archive/prime-mover-brand-lift-trucks-be-discontinued. Replace the (dot) with a. and close the blank spaces