I've got white, red, blue, and gray ABS for my 10" Prusa i3v 3d printer.
The thing that'll kill it is shipping. Minimum price I've ever been able to get on shipping anything anywhere in Canada is like $13 to $14.
I mean, I can print some hands and feet (as I plan to for my Bruticus, and maybe a change of shoes), but shipping would kill it if you wanted it for under $20.
There are a number of ones available for printing, if someone local to you can print them, some with more articulation than others, and different styles too.
To name a few just from checking on thingiverse (there are other sites too):
CW foot with ball joint
https://www.thingiverse.com/thing:1828913
Superion feet
https://www.thingiverse.com/thing:1333008
Posable hands
https://www.thingiverse.com/thing:1111886
Posable hands 2.0
https://www.thingiverse.com/thing:1822735
Defensor feet
https://www.thingiverse.com/thing:1141811
Articulated hands
https://www.thingiverse.com/thing:1250465
Bruticus and Menasor feet
https://www.thingiverse.com/thing:2026126
modded Bruticus feet
https://www.thingiverse.com/thing:1634277
And a few neat extras:
The enigma of combination
https://www.thingiverse.com/thing:1731747
Blackjack and Rodimus chest adapter
https://www.thingiverse.com/thing:1275817
Superion hips
https://www.thingiverse.com/thing:1853736
Superion thighs
https://www.thingiverse.com/thing:1635866
What looks like dummy arm and leg team members for superion
https://www.thingiverse.com/thing:1802220
joint parts for CW onslaught
https://www.thingiverse.com/thing:1972806
Bruticus cannons
https://www.thingiverse.com/thing:1816168
Brawl add-on
https://www.thingiverse.com/thing:1444695
Que Bravo conversion kit
https://www.thingiverse.com/thing:1399036
Hotspot panel
https://www.thingiverse.com/thing:1972208
Silverbolt/Cyclonus/Scattorshot hand replacement
https://www.thingiverse.com/thing:1632539
pack of guns
https://www.thingiverse.com/thing:1731747
Dreambane saber (big sword)
https://www.thingiverse.com/thing:1448220
Megatron parts
https://www.thingiverse.com/thing:1397039
Mixmaster cab
https://www.thingiverse.com/thing:1730753
Sim City 2000 tabletop playset (would probably scale better with Metroplex and Fortress Maximus, unless they're printed larger than suggested)
https://www.thingiverse.com/thing:12673
This reminds me, I still need to buy those 3d printed MegaMoonMan upgrade sets for Metroplex and Fortress Maximus, maybe a few others of his.
Hope that helps.