As I may have mentioned before I have a lot of Victorian Newspapers. All out of copyright too. So I thought I'd put up some images for you. Please copy and use as you like. They are adverts, scanned at 300dpi greyscale, not fiddled with them at all. You should be able to capture the images with a sniping tool and then print or alter them as you like. Hint at the bottom........................
............................ if you want to make vintage images look more authentic, then you need to print on vintage paper! Yes but where do you find that then? Well I use the blank pages from redundant vintage books, found at the front and sometimes the back too. Or you could use the blank pages that you find within vintage sheet music. Also at the end of chapters in books there is sometimes a 1/2 page blank. With careful positioning of your image that paper can be used too.
You will need to reduce the size of sheet music as its larger than A4. Also you need to measure the size of your pages and tell the printer this measurement. That will be somewhere in your Printer Properties menu, I know where that is for my printer but so many out there you'll have to read the booklet on How To.
Hope its warmer where you are than it is here.