This might be a good question for the Main Friends and Family forum as Evidence Based Treatments can be found in both Non 12 step, and 12 step treatment centers. Blue made a good point.. a medical consumer has to investigate the statement "evidence based" to see what treatments are offered, and to what degree.. For example is there 1hr per week or 12 hrs per week of CBT and other therapies available. Families and patients have to do their own research based on their own preferences and needs.
If you use the SAMHSA treatment finder then you can select options such as long term residential, short term, etc.. you can select options such as sliding scale.. among a host of other options to narrow search criteria. I do not see a button for "evidence based" however you can search for treatment facilities that use medications for opiate addiction such as naltrexone. A quick look at websites will usually tell you what they offer in terms of treatment and payment options.
For example, I did a quick search and found Phoenix House.. they use evidence based methods, offer a sliding scale for payment, accept insurance, offer variable length of treatment. Have locations across the USA. I believe you prefer 12 step treatment CO.. this center clearly states that they offer 12 step support groups for those who would like to use it, but it is not required for patients to do so.
I think you could also call the hotline for assistance.