Unfortunately, having the illusion of height will usually never be good enough for agencies or most clients that actually want the height. That's great though that you are able to photograph as if you are taller but in terms of being taken seriously by big agencies, that will not really help you get far. However, what you can do is look into agencies that have petite divisions (there aren't many agencies that actually have petite divisions anymore since the demand is not there but that doesn't mean they don't exist)...maybe you will have more success if you submit to commercial/print agencies as well. Often they will be more lenient towards bending the rules than the fashion agencies. Being located in New York, you have a whole list of agencies you could possibly submit to.
You should also look up the pretty well known petite model, Isobella Jade. She has a great blog and her own podcast where she helps to bring more attention to petite modeling and she often lets others know about opportunities for shorter models.