For folks unable to purchase K-Lite Orchid/Epiphyte Fertilizer (12.9-1.3-1.3-10Ca-3Mg) locally, rather than paying an exorbitant shipping cost to get some, why not blend something with a similar formula using locally available raw materials?
For example, folks in Europe who can purchase Akerne’s Rain Mix (11.8-2.7-13.7-11.8Ca-3.5Mg) can blend 3 kg of that with 2 kg calcium nitrate and 1 kg Epsom Salt to arrive at 6 kg of fertilizer having a blended formula of 11.6-1.4-6.9-14.1Ca-3.4Mg – still having good levels of N, P, Ca & Mg, and a K content half of the original fertilizer.