Hi Josh
Caves de Pyrene, which also sells to private has pretty much the entire De Bartoli range;
Tutto Wines, in London stocks Nino Barraco;
Hedley Wright stocks (for as far as I can see) Francesco Intorcia’s 1980 Marsala Vergine, but I cannot find any supplier for his Pre-British. Will check with Francesco if I can get hold of him;
Terra Amarae is stocked by Robert Rolls in London;
Badalucco’s wines are not in the UK it seems;
Tannico stocks some of the Viteadovest dry wines, but not the esoteric stuff which is produced in minute quantities.
Hope this helps and thank you for your kind words!