Booking one way using AP
I am planning on booking an award YVR-BRU for 2 business class seats using AP. AP only seems to be showing 1 business class seat at a time for their YVR-YUL-BRU flights. However I see 2 business class seats available flying into LHR and more availability flying LHR-BRU on a SN operated codeshare. My question is can I book these 2 legs by calling into AP and paying the $30 for them to book (since I can't see this option on the AP website)? TIA.