I've found few albums--like this or this--that have shots actually inside a hall; everybody takes pics of the statues and exteriors . I'm guessing it's one of the ethnic national pavilions.
still no luck!
Inside The Pavilions At The All Russia Exhibition Centre.
Many of the Pavilions are constructed in the style of one of the Soviet Republics and are worth a closer look. One of the Pavilions is wooden (complete with a wooden fresco depicting hard working Russians), while another is Middle Eastern in style, with Moorish mosaics and delicate plasterwork. The details on the Pavilions belie the old Western propaganda that communist buildings were shoddily built.
Although the atmosphere and goods on sale today are very different from the communist era, the All Russia Exhibition Centre gives a good picture of the architecture and values of the time