It's OK to have Malay culture buildings to be like Barbarian culture buildings. Malay do built their building by using woods. The longhouses and huts models are OK, and tavern model can be official building. We can use all model such as palace, blacksmith, (Swordsmith model can be Kilang Meriam) market, barrack, stable etc (excluding barbarian temples)...

A few different are, Malay buildings have many support pillars and not build directly on the ground, if you can add pillars to the buildings, then that's very good! I noticed that large market have pillar and stairs.

Only a few buildings are needed from eastern culture, such as Ottoman-influenced academy, (Madrasah and Maahad have middle-east scholar as patron, so logically they have eastern look) and palm trees to replace coniferous trees...

These are some buildings from Battle of Asia (BoA), maybe it can be made into mosque. Only the grey-bluish roof color not very good, can it be replace with green-brownish color?

Spoiler Alert, click show to read: 

a) Guard tower, without wall at both side mostly resemble mosque minaret:



b) Temple tower, second choice, if guard tower fail, but minaret not have multiple layers roof from the bottom:



c) Large building:



d) small building:



I think, very large mosque can be made by arranging large building at the center and 4 small building at the corner.