A sortiment of backpacks suitable to use on Mars Robot Monks for conversion purpose.
In the Tinkercad Link there are all incredients to make your own customised Powerpack.
The Gizmos.zip contains a few but not all of the things to make your own Backpack.
I very much doubt that you can print with an FDM printer so do that on your own risk, i strongly suggest to use a SLA printer for decent results.
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Tinkercad link:
https://www.tinkercad.com/things/f3mLhzugzA9
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Some of my other designs:
https://www.thingiverse.com/thing:3782993 - Com-Relay
https://www.thingiverse.com/thing:3776947 - Gothic Terminals
http://www.thingiverse.com/thing:3744307 - Holo Station
https://www.thingiverse.com/thing:3736132 - Power Generator
https://www.thingiverse.com/thing:3753543 - Plasma Coil
https://www.thingiverse.com/thing:3767627 - Pipelines for Sector Mechanicus
http://www.thingiverse.com/thing:3753403 - Adapter for Sector Mechanicus Pipeline Connection
http://www.thingiverse.com/thing:3751588 - Half Furnace
https://www.thingiverse.com/thing:3738491 - Industrial Topper/Caps for Furnace 3
https://www.thingiverse.com/thing:3669310 - Industrial Topper/Caps for Furnace 2
https://www.thingiverse.com/thing:3594894 - Industrial Topper/Caps for Furnace
https://www.thingiverse.com/thing:3530600 - Funnel/Chimneys for Sector Mechanicus
https://www.thingiverse.com/thing:3571386 - Industrial Reactor
https://www.thingiverse.com/thing:3576491 - Industrial Reactor Part 2
https://www.thingiverse.com/thing:3584131 - Industrial Reactor Part 3
http://www.thingiverse.com/thing:3508751 - Pipeline Pump Relay
SevenUnited
