Local Art Galleries
The first place to find the abstract art is to look into the local art galleries. You can get the information from the yellow pages or look online to see which art galleries are in your area. You can contact them to see if they have any artwork that you can get from them. They will at least be able to point you in the right direction even if they do not have what you are looking for.
Local Art Association
You should also contact the local association for art and get information of the artists that are present in the area. They will also be able to help you by letting you know where the art is available. This is the easiest way to find the best places for abstract art and any kind of art.
You can also check online for the best abstract art that is available in your area. There are many forums where posters from all areas are present and you can find out where you can get the art. You can also interact with artists in your area who are on these forums. You will probably have to visit a few forums but that is totally worthwhile as you will be able to get in touch with the right people for the purpose.
Visit the exhibits that are put on in your area. These will give you a chance you to meet the local artists and have a chance to be in touch with them directly. If you are in the circle of artists, you can certainly get the first look at the art that will be available in future and make your picks.