As I am left handed and the rest of my family are gammy handed Right handers and they very occasionally get on this PC when I go the toilet (they cant be bothered to fire up the three laptops

) they need to move the mouse so I go wireless for that main reason.
I had a great Logitech keyboard and mouse LX710, but I suspect the mouse has hit the floor a few times

as it has problems with copy and paste and a few other issues, now this mouse had he two extra buttons, back and forwards I used them for, but since its broke I have been using the old old logitech keyboard I took to work years ago and its belting strong but the mouse doesnt have the extra buttons on and its doing my noggin in.
So, can I just buy a mouse that has the extra buttons and will it connect to the receiver I am currently using? Or will I have to use another USB receiver (which I dont want to do)
Failing that has any one got a good set for sale, but must have the extra buttons on the mouse?