what you have is a straight model 100, not a 100G. they were made from the mid 30s to mid 40s. (cant remember the exact dates but it was about 10 years that they made them i believe) the 100 and 100G bolts are completely different and wont interchange.( i have both guns myself ) not sure about the trigger assemblies but i would assume that they wont either. all that being said the 100G and the Marlin glenfield model 10 "crown prince" are the same for all intents and purposes (the G in 100G is for Glenfield the way i understand it). (not that it helps you with a model 100. but still good to know in case you ever come across one.) one good pllace to check for parts is Numerich Gun Parts, they have everything you need as long as you dont need a complete bolt. unfortunately the prices are what they are because it is the only gun with those parts as far as i've seen. you may be able to find an entire gun fairly reasonable with salvagable parts, or in better shape than the one you have. i've seen them go for 50-100$ all over the web. i have an old model 100 that was my great grandfathers, it's a great little gun, very accurate. good luck with your search.