You can buy those rivets from McMaster-Car at a good price. I think mine were 50 to a box. For the straps that hold the spring pack together I purchased a 3 ft 3/4" wide steel strip from Lowes for cheap. It bent nicely and I just drilled a hole in it. Depending on the condition of your springs you may want to consider using vinyl spring liners with the lip on it which keeps the liner in place. I used them on my 52 panel and like them.
.....just some ideas. Keep us posted.
EDIT: Shoot me a PM let me know how many rivets you need and I'll drop some in a mail pouch for you.
