hi,
i got mine in Hong Kong but i found these all metal Y-connectors around Makati & Shangri-La Mall area... you may try to look for Elmo at MCS (Makati Cinema Square) as he might still have source for these... or AVDI at Shang... maybe brother Jeff (Theater Works, Trinoma) have these too...
i am not sure if Raon st. Manila reseller's have these but it is the place for reasonably priced parts for our hobby
will update this thread when i find source(s)
Merry Christmas !!!