[Alpines] OT: Lock for gate

[Paul Heuer]

Hi all,
A little off topic, but I'm putting in a side access gate in the  
fence at home. The gate is a sliding gate (manual) that closes  
against a 4in (100mm) steel post and it will be clad in 'colourbond'  
formed sheet steel (ie you can't reach through to unlock it). I want  
to be able to lock/unlock the gate from either side. Does anyone have  
any suggestions for a lock that would suit? The only solution I've  
found so far is a household deadlatch (Lockwood 355), but it is  
designed for the thickness of a timber door, so I would need to make  
up a 2in spacer to accommodate the 'free' lock barrel - and it's  
quite expensive.

Anyone been down this path before?
Cheers,
Paul.