I hadn't heard about the Atlantic Models shroud-and-ratline sets; many thanks to Mr. Stauffer for pointing them out to us. I tracked them down on the White Ensign website, and they look superb. (Here's a link to the 1/350 set: www.whiteensignmodels.com/.../1034 .
The gangs of shrouds are big - about right, maybe, for an eighteenth-century ship of the line. But it looks to me like it would be quite practicable to cut them down to any smaller size.
Makes me think about buying one of those old Imai 1/350 schoolships, or the same company's Cutty Sark.
Thanks again to Mr. Stauffer. If these sets become popular, maybe Mr. Hall can be persuaded to make some more aftermarket parts for plastic sailing ship kits.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.