Well, you'll need to get another ignition barrel, so with it alternate keys etc.
Secondly, get an Almax chain. Expensive, yes, but then how much is your bike worth? probably alot more than the almax chain
Maybe you should get a bike cover that you can tie to the bike. My oxford stormex one is pretty good, bit of a faff to get off and the clip is hard to find in the dark unless you know where about it might be
Matt