Have you tried ATCC?

http://www.atcc.org

You can contact MTCC, Chandigarh, India. They provide various kind of strains. You can visit their website for more information:

http://mtcc.imtech.res.in/

As I known, the characteristic of ER227 is mcrBC,DH10B is mcrA

Update 2020:

Papoutsakis is one of the original creators of ER2275.

You can get the pAN1, 2 or 3 plasmid (CmR, AmpR, KanR respectively, Φ3T I gene, ori) to perform methylation using any other common E. coli here --> http://papoutsakis.org/?page_id=21