I'm temporally not using UPS as there's been a lot of issues with them lately
Hard Park RC
Outlaw Weight Hanger Bracket For SCX24 Rear Axles. Made from 1mm carbon fiber. The bracket can be adjusted a few degrees in either direction. The hanger can attach to either side to keep them tucked in as tight as possible.
2 - Carbon brackets
4 - M1.4 flat screws for attaching to axle
hardware to attach hangers