And Trumpeter do the LCAC in 1/144 as well, both of which come with rather good vinyl 'skirts'.
Also in 1/144 is the venerable Airfix SRN4, which is GINORMOUS compared to any other styrene hovercraft model, and which seem to be quite available on eBay. It's the MK 1 though, and it needs a lot of work to build a Mk 2 from it, and a VAST amount to make a Super 4! I've been doing it for many years, and the end is not in sight!

AFAIK no-one ever did an SRN5 or 6 on our sort of scales, but you can get them in the R/C modelling field.