Looking for a Collapsible 5-gal oil container

I am looking for a collapsible ~5 gallon oil container. The container will be used in to hold low-level radioactive waste oil until it can be transferred to a permanent container. The only container I have found so far is made of LDPE (Low-density polyethylene) which does not have sufficient chemical resistance. The oil I'm dealing with is a Chevron NRR Oil 360. It is a hazardous substance containing Benzene DI-C10-18-Alkyl derivatives (<40%), Polybutene(<10%), and Selenium Compounds (<50% with Selenium present at less than 1.0%). I am looking for an existing product. Will not be using in quantities to manufacture. Any suggestions or company contacts would be appreciated.