Actually There are definitely trucks 7.65. Get those they are the closest.
Buy 7.5 that will only be a 1/8 of an inch smaller which would mean 1/16 of an inch on either side which would not be noticable at all. I hope that this helps
no, buy from your local independent skateboard shop
depends on your size it varies
a size 7.6/ 7.75
7.75 by 31
just buy skate hardware with the board