One solid state device that will generate a beam of heat is a high powered IR laser such as the kind they use to engrave wood or cut steel. For example Sony makes them from 90mW to 60W output **broken link removed**. But those are rather exotic and, I would imagine, expensive.
You could also try an array of small halogen bulbs, the type that have a built in reflector. They tend to put out a lot of heat as well as light. You could run them at a lower voltage to reduce the amount of light relative to the heat (but that can reduce the life of a halogen bulb).