Rear shocks adjustment

[dentist69]

I have just become aware that i am requiring two new rear shocks as they are leaking badly.

I understand they are adjustable, as in for rear wheel alignment purposes.

Is it advisable to also purchase new bolts etc for whatever is needed?

If so, can someone provide me with links to somewhere i can purchase said equipment/parts?

Thanks in advance, i was sure i posted something earlier this afternoon regarding this but it may not have posted correctly as has disappeared. I apologise if any part of my post isn't allowed ie asking for links to websites and this is reason for it going??