If the umbrella is for flash Photography, any camera store that caters to professionals and serious amateurs should have or be able to get you one.
One can find photography galleries at many places in Houston. The Houston Center for Photography is one such place. The Gallery M Squared is another such place.
One should go to an employment center to find all available photography jobs. At an employment center, They will help one find and apply to all photography jobs. One can also look on sites like Kijiji to find photography jobs.
A silver-lined umbrella is used to diffuse light from a flash that is pointed into the umbrella and therefore illuminates the subject with light from a large surface (the silver lining).
One can view examples of light photography on photography blogs or on professional photography companies' websites (such as Sony). Look around to find the best examples.
You can find an umbrella base and umbrella for your patio at Wal-mart. They have many to choose from in different styles and you most likely fine one for a good price.
One can find a photographer who specialises in taking maternity pictures from: Studio Diedre, Custard Cream Photography, Julie Harris Photography, Click in Moms, Sophia Field Photography, London Maternity Photography.
A white umbrella produces softer and more diffused light, while a silver umbrella creates more intense and focused light with higher contrast.
To find a help video for Photography Editing, one could go to websites including YouTube, Microsoft Forums, Adobe Forums, Photography Concentrate, and The Photo Forum.
There are many places where one might go to find dance photography. One could check online photo sharing website such as Tumblr or Photobucket for dance photography.
In photography lighting, a silver umbrella produces more intense and focused light, creating stronger highlights and shadows. On the other hand, a white umbrella produces softer and more diffused light, resulting in a more even and gentle lighting effect.
It is likely you could find one at a garage sale. Also try Kijiji or Craigslist as you may able to find a replacement umbrella there. If all else fails, find someone who can repair your broken one for you.
One of the best online place to find examples of vintage photography is eBay. eBay is the largest online auction site. You will be able to find a wide variety of photography but also at a very reasonable prices.