I'd say establish a relationship with a couple of local breeders. Either have them train you to spot those morphs or buy from them once you're sure they have those morphs. I've only hatched one clutch of sparks and think I got two worlds firsts in that clutch. It took me a while to spot the Spark in one Pinstripe, but as it's aged it has become obvious. Spark is subtle, it takes an eye to see it.