I live in the desert southwest where ramps are not available or even known. What do you suggest as a substitute.
I'd go with leeks. The younger the better.
although not exactly the same flavor profile, I looked at this recipe and thought that broccoli rabe would be a good substitute.
you might try a mix of green garlic and scallions as well.
I sympathize with your difficulty. I love ramps but they really are kind of a Northeast thing, unavailable in most of the country. The flavor captures a bit of both onion and garlic so I think the suggested mix of garlic and scallion is a good suggestion.
Leeks, garlic and scallions would be a good mix. Ramps are pungent in their garlic flavor but also very scallion-y. Leeks would add nice softness to the whole thing.