Have to admit that if there was such a thing, I might be tempted, though I already have the long barreled 357 thing cornered with my Contenders.
From a sales standpoint, 8" 357s have never been a big seller, even in the glory days of silhouette shooting. With today's demand for revolvers for CCW and SD work, the long barreled stuff would probably be even less of a seller. Just can't see it happening with Ruger, but who knows?
Never seen an 8" nor heard of one. But with ruger you just never know. I did see a really cool 6" on GB recently - the original owner had Magnaport port it and cut rectangle slots in the top of the barrel ala "Colt Python look" and polished to a mirror shine. Looked really impressive - but expensive. Wish I had thought to capture the pictures before it sold. There was your "Rython"!