Hmmmmmmmmmm..I looked briefly but I thought if they had those then they would have had the a6000. Did you look at SmallRig?
Thanks again SteveG, yes I looked at all the links you sent me. The cage is overkill and I should have mentionned in the original post "Arca-Swiss" L-bracket. There are slim (without Arca-Swiss) L-brackets, but the Arca-Swiss L-Bracket I have extends too far up front to allow me to add the LA-EA4 adapter.