It is hard to separate what she did for him that was for the sensory issues and what for his other motor issues. However a few activities she included:
Physical games involving climbing, swinging , throwing, catching and carrying heavy things. Using an oversized skateboard/roller board and propelling along with hands.
Target orientated games involving aiming different weights of bean bag, for example into a bucket. Also this was complicated by having him swinging, balancing or moving whilst aiming.
Guessing and assessing different objects by touch/weight/texture without looking.
Playing with sand and water, playdough, finger paints etc and winding toys such as a yoyo. Arts and crafts type activities.
Not sure what of these, if any, would be relevant to your ds. that your paed won't refer him. ds is 7 1/2 and is in the process of being referred to OT. Perhaps it varies by area, we may yet have to wait or go private.
Good luck