Replacement Fan for Volcano 7+?

i've been reading on here the the fans used by the Volcano 7+ aren't the best and I was wondering what people recommend to replace it with.

I use a Plycon 80mm-120mm fan adapter drilled out to accept my Volcano7+ screw spacings. This gives me a 70mm-120mm fan adapter, something that doesn't commercially exist. Using Plycon's 84CFM chromed 120mm fan, my [email protected] idles at 42C, maxxed out at 55C. Cool and very quiet...Mark