I have two sets of 7TCU FL sizing dies now. I'll trade my FL die for a Neck Sizing die.
Or... willing to sell my extra set of RCBS (34201) 7TCU FL dies for $30, plus $6 shipping.
I just tore them completely apart, cleaned them, reassembled, and sized three pieces of brass with them to ensure they work perfectly. Great set of dies. I just need a Neck Sizing set more than I need two sets of FL dies.
All the best,
If at first you don't succeed, buy newer/better equipment.