I don't think this product exists anymore.
Also, from what I remember, there was some negative feedback about Quinko valves:
They required cutting larger holes
They introduced rigid hardware on flexible bladders
Adhesive replacement valves became simpler and more universal
You're better off installing universal valves like the Uni pump from Dr. Tuba:
drtuba.eu/adhesive-valves?q=Valve+type-Universal+One+PumpIf not, search their website for your kite's brand valves, they may have them.
Better yet, order a whole new bladder set from Dr Tuba which is sometimes the same price or cheaper than ordering a bunch of valves.
Hope this helps.
Christian - KiteBud