Hi Glenn:
Not yet an updated place (some are in GrabCAD, but old). Please send me a PM with details: quad, hexa, legs type ("T" or separated, fixed or removable, retractable legs, etc) motors and propellers you plan to use). I´ll send you proper stl files.
Below some examples:
QUAD 750 (mm Motor to Motor), RcTimer 5010
QUAD 620, TAROT 4006
HEXA 814 RL (Retractable Legs)
HEXA 814 RcTimer 5010, 15inch propeler
HEXA 638 RL, TMotor 3110
All this has been built and flown succesfully
Angel