I designed a t-shank to cleaning rod adapter for my surge : r/Leatherman
Leatherman Universal Tool Adapter | REI Co-op
Scalpel Blade Bit Holders Saw T-Shank for the Leatherman Free P2 P4 Series | eBay
Make the most of your Leatherman Surge! Tips & tricks from Knivesandtools
Leatherman Tool Adapter : Modification of the old model for universal use - YouTube
Galvanox Universal Socket Adapter Compatible with Leatherman Flat Bit System - Skeletool, Surge, MUT, Wave Plus and Signal Multitool Kit Set ( Multi-Tool Accessories) - Amazon.com