This is the way.
I remixed Dr Operator's Boba Fett to make this Mando. Most pieces are from the Boba Fett set, and can be downloaded from that page. The Dark Saber was remixed from the original MINI 13 sword. The Mudhorn was remixed from Faiq's rearview mirror ornament.
The Mando specific models are:
Jetpack
Helmet
Whistling Birds
Mudhorn Pauldron
Dark Saber
You will need these files from the Boba Fett Remix (now included here!):
Belt
Chest
Shoulder (x1)
Cape
Head
Arm (x1)
Waist
Shin (x2)
Thigh (x2)
The author remixed this model.
I changed a few of the armor pieces to look like Mando's armor. Enjoy!