Where can I locate a clinic that custom makes hearing aids in the Portland, Maine area?

Here are a few locations in the Portland, Maine area that offer custom hearing aids:

* New England Audiology Associates - Portland: 100 US Rte 1, Unit #2, Portland, ME 04101

* Maine Hearing Specialists - Portland: 22 Bramhall St., Suite 210, Portland, ME 04102

* Miracle-Ear - Portland: 15 Lowell St., Suite 1, Portland, ME 04103

* HearUSA - Portland: 201 Marginal Way Suite A4, Portland, ME 04101