It would be so easy, at least for a specialist in textures. Divide the Args for the numbers into the left and right sides.
The entries already exist in the description.lua. New they could be as follows:
{"MIG19P_T2_R_FUSE1", DECAL, "MIG19_XXX_Decal", false};
{"MIG19P_T2_R_FUSE10", DECAL, "MIG19_XXX_Decal", false};
{"MIG19P_T2_R_FUSE100", DECAL, "MIG19_XXX_Decal", false};
{"MIG19P_T2_L_FUSE1", DECAL, "MIG19_XXX_Decal", false};
{"MIG19P_T2_L_FUSE10", DECAL, "MIG19_XXX_Decal", false};
{"MIG19P_T2_L_FUSE100", DECAL, "MIG19_XXX_Decal", false};
to be able to represent only two numbers, would have to
{"MIG19P_T2_R_FUSE1", DECAL, "empty", true}; and
{"MIG19P_T2_L_FUSE100", DECAL, "empty", true}; for further ahead on the hull or
{"MIG19P_T2_R_FUSE100", DECAL, "empty", true}; and
{"MIG19P_T2_L_FUSE1", DECAL, "empty", true}; to stand further back on the hull.