I really want an alpha Inferlupa

I don't mean Prismana, though I will go for that during the event as well. So far I just like my critters big, more than I like their prismana variants. However, unlike Glynsera or Scorchhowl, there's no obvious way to get an alpha Inferlupa.

I've seen people get alpha Flameruffs, but I don't even know where to focus my effort and resources for a chance at an alpha emberpup/Flameruff, and that I'd need it with perfect potentials goes without saying if it's gonna have a spot in a team.

Any ideas? There are eggs that contain them, but I may die of old age before I see one, and I won't know when to fire my sparkling cubes.