Beware McSalvors they have gone pricey
If you round Plymouth take a look at Bogeys on Mutton Cove
https://www.knightsurplus.co.uk/
Check out their trawler jackets at about £8 as well, Only trouble with them is the zips, bur the Velcro and a belay belt keeps them snug
They went pricey years ago, the price labels on the stuff on display never used to indicate +VAT, folks thought they were getting a bargain until they got to the check out, all that changed all of a sudden.
Just found a place on the web near to me, TMS, Par. I'll give 'em buzz tomorrow, the stuff I need has to be low stretch double braid, the melting point of polyprop is too low.
Lozz.