FFNs can now cost up to £60 per pair. I've tried for ages to source a cheaper alternative.
Black 100% Nylon Stockings, 5 Denier Non Stretch Stockings With Deep Welt
Vintage 100% Nylon Stockings, Authentic Style, Look & Feel, 4 Colours, 3 Sizes
Cecilia De Rafael RHT Sheer Heel 100% Nylon Stockings. All Colours / Size S - XL
Seductive 100% Nylon Stockings, Vintage Authentic Style, Look & Feel, 4Colours
Eleganti RHT 100% Nylon Stockings In Grey Size L Imperfects BNWT
Vtg Fredericks of Hollywood Style 3157-5 Tall White 100% Nylon Stockings USA