Allen-
It is easy to dig around with little result, especially with the brads or rivets.
It might be worth your effort to find Matco Manufacturing's site and order from them.
On my VariEze Matcos the pads are the same as for a Cessna 150 but the
rivets/brads are different., longer i think. An initial phone call to Matco would help you determine
what model number you have and would be useful later if and when you rebuild the cylinders.
The pad replacement is simple but if I didn't build the plane or if I was doing the brakes on it for the first time,
I would watch a seasoned A&P and give him the chance to look over the rest of the system and tell me why
he tightens the brads/rivets the way he does.
Good flying-