I used IrfanView to resize the image to 1024 pixels wide (actual 10.4” wide on my laptop), and it’s not great, but not that bad. Viewed from 10 ft. away, it’s hard to see the flaws. Then again, I probably am due for new glasses!
Can you provide links to all the images? I’d think one of our fellow FReepers could whomp up an improved rendition in an hour or so...
All the elements can be found with a quick google image search - just sort by size to find the images with the best resolution. The layout would need to be changed if you want it to conform to common bumper sticker dimensions.