Kwery about "Kwila"

[Ross Clark (FOA DALSL)]

"Kwila" for the tree Intsia bijuga is attested in Tok Pisin as early as
Murphy (1949, 3d edition, which is all I have). It is apparently from Tolai
(Malcolm Ross). In recent years (since the 80s?) it has become the trade
name for the timber of this species, at least in Australia & NZ. (My
interest was sparked by driving to work every day past a timber yard
advertising "kwila" for sale.) This looks like an emergent TP loanword in
English. The earliest use in print in English that I have found dates from
1987. I'm guessing that the use of this word in English began with the
development of an export trade in this timber from PNG. Can anybody fill in
any dates and details of this?

Ross Clark