I spent a good part of this now (lament) passing summer (Ooh Canada) restoring a Mac 26D I purchased in May. One little product it took me some time to track down were the hole plugs (locking hole plugs)that fit into the production holes in the cabin roof allowing access to bolts etc for top side gear. I found lots of places selling plugs in every colour except white or cream, and many that would happily sell me a minimum batch of 1000 at a time, which seemed like overkill for my 8 or 9 missing hole plugs. I eventually found a place on the Internet that will sell one piece at a time if that is all that is desired. Thought I would share their coordiantes as it took me a solid three days of contacting various on-line product sales companies before I could get the right size plugs, color and didn't need to buy more than needed. Their link is: www.non-ferrousfastener.com