I want to book a mixed class booking on Malaysia Airlines. BOM-NRT in J and KIX-AMD in Y. I can pull up the fare on Matrix by forcing it to use the cheapest available business fare class on the BOM-NRT sector (Z) and cheapest economy fare class for KIX-AMD sector (Q). I can not book the fare using powertools, book with matrix, or the MS website. Also tried Kayak's multicity option but it only shows either all economy or all business class options. Do I need to contact a travel agent?