ORBs of 402 and 442 Sqn are online for free (as all other RCAF squadrons and a bunch of other RCAF units).
402 Sqn
Form 540:
http://heritage.canadiana.ca/view/oo...67/879?r=0&s=2 (and next page)
Form 541:
http://heritage.canadiana.ca/view/oo...67/890?r=0&s=2 (and next pages)
Report in appendice (not much details):
http://heritage.canadiana.ca/view/oo...7/1185?r=0&s=2 (and next page)
442 Sqn
Form 540:
http://heritage.canadiana.ca/view/oo...19/396?r=0&s=1 (and next page)
Form 541:
http://heritage.canadiana.ca/view/oo...19/403?r=0&s=1
The website is very useful for any RCAF query, even if it is hard to find something (but people made indexes and propose them in forum, even if I don't remember where I picked mine, here or on RAF Command forum).
And then once you have the right folder, searching it can be long because all are not in the good order. For example for 402 Sqn ORB is in chronological order while appendices are in anti-chronological orders (I mean reports of October 1944 are before September 1944).