I recommend Air Asia and reckon you would be ok with the 10'4 even.
I checked before I went to Bali in July, I couldn't see much about maximum length online so I call them because I was originally thinking of taking my 10'2 Mano and it fit within their limits.
Can't really remember what the limit was, I think it was either 3.2 or 3.5mtrs but either way my 10'2 would have been ok, 3.2mtrs is around 10'4.
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I booked an extra 40kg of sporting gear (around $50 from memory) and took absolutely everything.
A 9'2 SUP, 6'2 surfboard, 5'9 kite surfboard, 3 kites paddle harness etc = 38kg, no worries.
Heading back in March but just taking the SUP and paddle this time so should only cost me an extra $20 each way
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Return flights with extra sporting goods both ways for under $300, happy days