While there are no blends that capture the quality and magic of the Frog.
If we are talking the original (Frog on a log), then Kramer's Father Dempsey is solid, but Boswell Northwoods is likely the closest I've found, even though it is quite pricey I only bought 2oz.
But to echo the opinions of others, there is no match, and likely never will be. All we can do is appreciate that it existed at all.
Iv'e found my solace in Presbyterian, no it's not anywhere near the same, but something that makes me feel that same magic with every bowl that the Frog did.