Your selection in monuments gave 27 results.
The find of a building (D) about 30-40 mtrs S-W from the Mithraeum seem to point at a second sanctuary.
1) Small white marble column (H. 0.45 diam. 0.07), decorated in high-relief with a spiral-like twig with oak-leaves and acorns (Gallia, 318 No. 46 and fig. 10).
Two small heads (H. 0.08-0.10) in Phrygian cap (Gallia, 308; 318 No. 41 and fig. 11), which seem to belong to a representation of Mithras tauroctone.