Part for VHF/FM booster?
The MAX2650 LNA (Low Noise Amplifier) is not the amplifier they are using, but it may be suitable, depending on the gain you want. The MAX2650 has a gain of 18.3dB at 900MHz. If you need higher gain you can cascade a couple of them.  

The one in the schematic you linked to is an MMIC (Monolithic Microwave IC), like Leon says. MMICs often consist of just a couple of transistors. This is a typical MMIC package:  

  

Notice that it has two ground pins on opposite sides for improved PCB layout, but that also means that the power supply has to share a pin with the output. The MAX2650 comes in a SOT-143 package and has separate pins for these.