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We propose a first-look survey of twelve galaxy clusters that comma based on optical selection criteria and archival X-ray data of similarly selected clusters comma are very likely to be bimodal merging clusters capable of constraining dark matter properties. The candidates have ge2sigma RASS excesses but otherwise have not been studied with X-rays. By locating the X-ray peakopenParsclosePar well enough to determine if they have separated from the galaxies comma the survey has the potential to discover new laboratories to probe the nature of dark matter.