A few years ago, the RAF Marham website had a collection of RAF / RCAF / Station crests on the site. That was until an officious Aux / RAFR Officer in the AHB said they were copyrighted and had to be removed. The crest images were around 1.48 x 2 inches 300px in size. I am sure these could be scaled up to a larger size.
If you can find someone who downloaded the collection before they were removed ....
