Patons
Hardware store
Patons Ritz yarn was a bulky yarn. It was about 12 ply.http://www.ravelry.com/yarns/library/patons-ritz
The price of the padlocks depends with their sizes.
Alternative yarn choices: Patons Symphony or Wool Tweed DK
It appears by looking at the Patons link I attached, that this yarn is still available. If you don't know where to find it in your area, contact Patons and they would be able to direct you to an online or retail store in your area. (at the top of the page of the Patons link, is a Store Locator tab that you could also click on).
because its pertty
Around 20 million padlocks are sold each year in the US. The demand for padlocks is driven by security concerns in both residential and commercial settings.
"Many school lockers already have built-in locks, but for those that do not it is recommended to buy Master Lock padlocks. These padlocks are strong and sturdy to prevent someone from breaking into the locker. They are also easy to use, which helps save time in between classes."
Patons has many weights of Tweed wool, so look through the Paton link and see if you can find the specific wool you are looking for and have an answer that way.
When you buy it, the combination should be provided. You are not supposed to find out combinations for other peoples locks, that's the entire purpose of having them.
semiannually
Semiannually