Hi dingaling,
I'm glad that you managed to get the bearing carrier apart without doing any irreparable damage.
On to sprockets, it's certainly done quite a bit of work to wear all those teeth like they have been and also a tad unusual in profile, but on the other hand I have seen far worse than what you have there so it's not all bad news. Much of the wear has probably been more of a case of poor chain adjustment and letting them run too slack.
I don't think you will be able to purchase the land roll clutch sprockets, so you might just have to stay with those but all the others are still available.
As far as the amount of rail deflection that is evident it will most definitely have to be corrected to get correct primary clutch alignment.
Again as I suggested I would be using the services of a press and thus you'll be able to chock the rail in the correct places and only put the pressure on the specified section and not have an effect on the side plates. Hammers should not be used for this type of corrective action, well not in my opinion anyway.
I note that you are also in Adelaide and as such if you don't have access to a press I can help you out as I have one on hand.
Cheers,
BB.
