V - Belt

[Peck]

if really desperate to find an exact size that isn't in the library, there is always the option of making the new belt from scratch (would give plenty of practice).

[tim-tim]

I was thinking that they wanted a V-belt because it was easy to machine the pulleys. This was one of the "simple" projects I did during my intro to manufacturing class.

A lathe is all you would need. Sure some other tooling would be nice. But a lathe is all you would need to make your own pulleys. Food for thought.