Bit of a shame that they can't be locally produced.
Not really, there's no sentiment in commercial operations and tug owners aren't about to support the low productivity and high wages which would occur here.
Low productivity because there is no current yard tooled up to produce these tugs and local wages and labour relations are very different to VN.
Not so long ago when shipbuilding subsidies were around we did build many types of commercial vessels including tugs
Taiwanese government offically signed the contract for their indigenous submarine programme. Not mentioned in the link but they also trying to use HSLA-80 instead of HY-80 for their submarine, warship and even infrastructures such as bridges to achieve economic of scale for the steel mill. Just wonder, how's HSLA-80 compares with HY-80?