I've personally lived Downtown for 11 years.
A three bedroom loft is unusual, not impossible. Our office has a listing that is a 3 bedroom, huge 7000 sq ft loft. It is much larger than a typical house. It has its own "backyard space" too. It is a very unique property but is listed for $2,000,000. (Most people do not want to spend that much money on a loft).
Please feel free to contact me if I can help you find an alternative. We do work with the downtown loft specialists and would be happy to refer you to them, as they rule the loft real estate market!
You can search the MLS on our website as well at http://www.myLARealEstateGroup.com
Good Luck to you,
Lou and Alex
LA Real Estate Group
Most lofts are open spaces, and many have no bedrooms. You may want to find a larger space and building the walls in or create some other sort of partition.
I have the names of several contractors who work specifically on lofts that I can give you if you have questions.
Best of luck on your search!
Re/Max OTB Estates
Trulia doesn't currently show any 3-bedroom lofts for sale in Los Angeles but if you access the link below to a search for loft properties in the area you can sign up for email alerts (towards the bottom of the page) to ensure that you will be alerted when new lofts come on the market.
I hope this helps you.
Customer Service Representative