I’m looking for suppliers of hand-drawn stock imagery for a project that needs a consistent visual language (hence there should be larger quantities of material from the same artist/s) but doesn’t have enough of a budget to hire an actual illustrator to do custom-tailored work.
Do such specialized archives exist? The material provided by mainstream stock archives is hardly consistent enough, and tends to veer on the “vector illustration” side rather than a real “hand drawn” look.
You might have better luck at a book store / Amazon than online for this. Or hiring an illustrator since you need a consistent visual language.
There are books dedicated to royalty free illustrations, mostly old ones that are no longer covered by copyrights: Royalty Free Illustration Books
For example there’s an entire book Animals: 1,419 Copyright-Free Illustrations of Mammals, Birds, Fish, Insects, etc (Dover Pictorial Archive)
which as noted in the title has 1,419 illustrations along these lines: