I recommend Ample Designers budget friendly presentation design service. they offer custom powerpoint, keynote, perzi presentation design service over 5 years all over the world.  

Thanks for the answer Millan.

Something fishy going on with ”Ample Designers”. Their sample page shows four mediocre stock photos and no presentations. Seems a bit weird for a company claiming to have been doing this for five years. Have you actually used their services Millan?

I’ve had nothing but good experiences with Stinson Design. They are not the cheapest presentation agency, but they are among the best.