Yo bro - did you use this link
https://www.flylineshop.com/shop.html#!/~/cart ? When I looked at a Barrio site last week (I'm a bit confused on which site is Barrio's - they may have changed things around) they said they were awaiting a shipment from their new supplier, based here in the US and no longer the UK. I hope the plastisol formulas are similar enough for the lines to perform the same. Anyway, prompted by your post, I pulled up last week's link and it looks like they are willing to ship me a nice SS 4wt. I dimly recall the Barrio site a year or more ago had a much different look and format.
tl
les