If your looking for instructions or box content here are the sites I use.
Two main sites
http://www.1999.co.jp/eng/
http://www.model-making.eu/
Some others
http://www.luckymodel.com/
http://www.towerhobbies.com/
For Aeromaster or Eagle Strike decal placement guide
http://www.squadron.com/ProfileSearch.asp?Submit3=Go
Some more resource
http://www.fcmodeltips.com/2013/10/manuales-de-montaje-de-maquetas-models.html
https://www.scalemates.com/kits/
An example https://www.scalemates.com/kits/102231-revell-04194-fokker-d-vii
Below the 'Decal options', there is a section 'Instruction sheets' with a pdf attached. This is relativity new function or use so results can be spotty.
Cool!
RonV
One more for your older kits, a number of Testors/Italeri kits.
https://www.facebook.com/Plastic-Model-Kit-Instructions-1429829590656282/