According to Thornycroft yard list

#2417 Abra Q-I 55f6t RY/12-530 RA/4-35 46.533w 1939
#2418 Luzon Q-III 65f6t RY/12-600 RA/4-35 41.19w 1939

both were delivered in 1939

Q-II is a mystery, but book by Kafka gives

Q II (1938 Bay City, Mich , USA)
78ftx 15ft9inx4ft10in
600bhp=17.0kts 3 Diesels
1x37mm 2MG 2x18" TT

Q IV and Q V were very probably ordered by Thornycroftz,but never delivered (both sama data as Q-I)

In 1940 (?) Q-I and Q-III recieved new numbers
Luzon(Q-111),
Abra(Q-112)

Moreover 8 or 9 boats were laid down at Cavite (including Q113-Q119) , of them two were completed in 1942

Agusan(Q-113)
Dandy (Q-114)

All destroyed by Japanese A/A 10 Apr 1942 or later on slipways.

Q-IV & Q-V could by of part which were requistioned as MTB-237 - MTB-217 by the Royal Navy

Any additions and corrections, especially origin of Q-II.