Yamashita Hobby of Japan has released a Mushroom Ventilator and Fairlead Set for Japanese vessels in 1/700 scale.
The set consists of various destroyer-sized mushroom vents and fairleads. These Yamashita Hobby sets look to be comparable to the old Skywave/Pit-Road detail parts sets from the 1990s, but much finer. Though smaller and less comprehensive than the Skywave sets, these new offerings are also much less expensive.
The Mushroom Ventilator and Fairleader Set
set can be ordered for ¥850 (approximately US$8.00) from Hobbylink Japan at https://hlj.com/product/YMSYH700P02.