It is my hope that these two articles would help you. I had compared my locally sourced surfactants with a known synthetic product and they gave better results.
Spent Mushroom Substrate/Wastes, Fish wastes and Goat faeces/Manure are good local substrates used for remediation of oil polluted soils. They have been used successfully and it yielded good results after 56 days of field studies. Give it a trial but in a combination of microbial isolates treated with a resuscitation medium for weeks before application.