Where to find some parts for 33 nra rifle

[pabirdman]

Picked this gun up as I like the older trainer models,but appears something is missing as clip will just fall out,doesn't clip into anything.Would anyone have pics of a complete one or schematic and where to find parts?Thanks,Glen
http://i132.photobucket.com/albums/q24/pabirdman/100_5940.jpg
http://i132.photobucket.com/albums/q24/pabirdman/100_5942.jpg