75 gallon reef; looking to add a home for clown fish.

[1bigstud]

Unfortunately ive had to recently part way with two beautiful oscellaris clown fish.
problem was they had gotten too aggresive to any new fish I added that were smaller than them.
I am hoping to add 2 new ones, once I have finished stocking smaller fish in my tank, ie blennies, gobies etc.
I was thinking i would add a proper home for them.
they used to try to host in my hammer coral, but it was small and would close on them.
can anyone reccomend amgood host that is reef safe?