[VoiceOps] Fax ATAs/devices

Fax is dead. Long live fax. We've resisted supporting it, but customers still need it on occasion, and they hate having a separate landline carrier just for a fax line. So I'm wondering what others here use successfully to provide their customers with a "fax line" to a physical machine. We would only use a handful of them, and only with our customers who have a fully managed service (IE, 2-3ms connection directly to us over MPLS). We run Asterisk and pass T.38 to a few carriers. We currently do fax to e-mail inbound on Asterisk with no issues. Volume is very light, maybe 3-5 per day per customer, so things like the Vitelity FaxEnable don't make economic sense ($25/mo unlimited our cost).