>>95938773
because 40k titans sell to a larger consumerbase, kharadron stuff have a much smaller pool of customers, for a similarly costly kit to produce
Not to mention FW has almost abandoned the making of large resin stuff nowadays

Research Alec Burnside's conversions and replicate them yourself, there are some indications on how to replicate them, the kharadron kits used and the navy models to start from

Chop chop