Carlisle Brass - 102mm (4") Heavy Duty Sliding Surface Door Lock Bolt for Internal Latch Doors and External Doors and Windows (Polished Brass) : Amazon.co.uk: DIY & Tools
1865 Self Latching Top Flush Bolt with Bottom Fire Bolt. Architectural Builders Hardware Mfg. Inc.
Stone River Bronze 6" Manual Flush Mount Shoot Bolt - Dark Bronze