Based on orthology to human genes, the following genes are likely to be components of the D.mel mitochondrial ribosome:
( Note:research  publications supporting the mitochondrial ribosome subunit assignment of the human ortholog are also listed.)
Small mitochondrial ribosome subunit:
CG4882, FBgn0025336; Human  otholog:MRPS27 , HGNC:14512 (PMID:22841715)
CG12848, FBgn0040666; Human  otholog:CHCHD1  (aka MRPS37), HGNC:23518 (PMID:23908630)
Ptcd3, FBgn0033816; Human  otholog:PTCD3  (aka MRPS39), HGNC:24717 (PMID:19427859, PMID:23908630)
Large mitochondrial ribosome subunit:
CRIF, FBgn0037102; Human  otholog:GADD45GIP1  (aka MRPL59, CRIF1), HGNC:29996 (PMID:25278503, PMID:23908630)
CG6094 (FBgn0032261); Human  otholog:MRPL58  (aka ICT1), HGNC:5359 (PMID:25278503, PMID:20186120, PMID:23908630)
CG14817, FBgn0026089; Human  otholog:MRPL57  (PMID:28892042)
mRpS30, FBgn0030692; Human  otholog:MRPS30 *, HGNC:8769 (PMID:28892042, PMID:25278503)
mRpS18A, FBgn0051450; Human  ortholog:MRPS18A **, HGNC:14515 (PMID:28892042)
*MRPS30 was originally classified as a component of the small subunit. It has kept its gene symbol, but in UniProtKB the protein is named 'Large ribosomal subunit protein mL65' (UniProt:Q9NP92) and is an acknowledged component of the large subunit and not the small (PMID:25278503).
**MRPS18A was originally assigned to the small subunit. It has kept its gene symbol, but in UniProtKB the protein is named 'Large ribosomal subunit protein mL66' (UniProt:Q9NVS2). PMID:28892042. In D.mel there are three S18 genes. In bacteria, the S18 subunit is located in the small ribosomal subunit. This is conserved in other lineages and is equivalent to the metazoan MRPS18C subunit. MRPS18B is also located in the small subunit, but at a different site and while MRPS18A is a component of the large subunit (PMID:27489352).