You do not necessarily need to used bucked rivets to do your repairs. Especially for the inner attachments. The outer skin can be riveted with Olympic style rivits that are like pop rivets in that their stem is pulled out from the outside. The interior rivets are mostly standard 1/8" aluminum pop rivets available at most any hardware stores and the big box stores. One of the better purchases that I made was to buy a pnuematic pop rivet gun from Harbor Freight. Check out the following:
Harbor Freight Tools - Quality Tools at the Lowest Prices
Do a search for Olympic to find out more about this type of rivet.
Malcolm