Water pump came off with ease

so shouldn't be too many nasties from here on fingers crossed
Called it a day for now as a few pipes are starting to perish so adding those to my shopping list and I may as well change the oil pump drive gear anyway for the sake of a few extra quid while it's apart.
I need a cambelt rear cover it's obviously been hacked about for the newer style water pump at some point in it's life and then badly fitted so the cambelt has been cutting into it. Seem to be able to find the front covers but not the back part. Any ideas where to try?
Final point for now, I've read that the belt tension tool makes a click, mine doesn't seem to do they all make a click or have I ended up with a faulty one?
Thanks for the tips so far guys especially on the oil pump drive gear seems totally pointless not to change that for what it costs when doing the front end.