RAF Far East Command ORBAT for 7 Dec 41 (the day before the Japanese attacked):
Northern Malaya
Sungei Patani
21 Sqn RAAF - 12 Buffalos
27 Sqn - 12 Blenheim MkIfs
Alor Star
62 Sqn - 18 Blenheim MkIs
Kota Bharu
1 Sqn RAAF - 10 Hudsons
243 Sqn - 2 Buffalos on detachment from Singapore
Gong Kedah
36 Sqn - 7 Vildebeests on detachment from Singapore
Central Southern Malaya
Kuantan
8 Sqn RAAF - 8 Hudsons
60 Sqn - 8 Blenheim MkIs on detachment from Mingaladon, Burma
4 AACU - 2 Swordfish on detachment from Singapore
Kluang
Y Sqn - 2 Blenheim MkIs, 2 Tiger Moths and 1 Tutor
W Flt - 6 Wirraways
Kuala Lumpur (aka Sungei Besi
C Flt, MVAF - 2 Tiger Moths, 1 Leopard Moth, 1 Hawk Moth, 1 Falcon
Ipoh
D Flt, MVAF - 2 Avro Cadets, 1 Gypsy Avro
Penang
E Flt, MVAF - 5 Moth Majors, 1 BA Eagle
Singapore
Kallang
243 Sqn - 15 Buffalos
488 Sqn - 17 Buffalos
4 PRU - 1 Buffalo with second in preparation
A Flt MVAF - 3 Avro Cadets, 3 Tiger Moths, 1 Moth Minor, 1 Hornet Moth, 1 Whitney Straight
B Flt MVAF - 2 Dragon Rapides, 1 Dragonfly
Govt Flying Trg School - 6 Moth Majors
Sembawang
453 Sqn - 15 Buffalos
8 Sqn RAAF - 4 Hudsons
Tengah
34 Sqn - 17 Blenheim MkIVs
4 AACU - 6 Swordfish, 6 Sharks and 2 Queen Bees
Seletar
36 Sqn - 5 Vildebeests
100 Sqn - 14 Vildebeests and 6 Beauforts (one Beaufort converted for PR missions)
205 Sqn - 5 Catalinas
RN Comms Flt - 1 Walrus
RN Fleet Requirements Unit - 5 Albacores in storage
Burma
Mingaladon
67 Sqn - 18 Buffalos
60 Sqn - 4 Blenheim MkIs
With the exception of the Burma numbers, the data are taken from "Bloody Shambles Volume I". The listing probably originates from AHQFE weekly force totals which did not include reserve aircraft. For example, 21 Sqn RAAF had 18 Buffalos at Sungei Patani but probably only had 12 operational on 7 Dec 41. Similarly, some 32 Buffalos had been sent to Mingaladon to afford 67 Sqn a 100% reserve complement of airframes.
Hope this helps as a starting point.
Cheers,
B-N