I racked 8 Raindirk modules using these. I cut one position off the end and they worked perfectly for racking purposes.
https://www.ebay.com/itm/5pc-Industrial-Card-Edge-Slot-Socket-Connector-34x2P-68P-2-54mm-0-1-3A-RoHS-/130805333599?hash=item1e749afe5f