Here they are!
Please note that the ECH is almost identical in appearance to the ACH, but it costs more than double! (The FedLog price is $700+ and you might pay even more, depending on the situation.) So, before you sign for your "ECH" because someone says "believe me, that's what it is"...... make sure that's what you're actually getting...... i.e. check the NSN's!!! Otherwise you could wind up sweating bullets when it's turn-in time.
FYI, the Army and Marine Corps ECH's are both covered under the following TM:
http://www.armyproperty.com/tm/10-8470-211-101. Enhanced Combat Helmet -- Army (ECH-A)
Class II: Uses H-back retention ("H-Harness"), Tan 498; LIN unknown
X-Small:
http://www.armyproperty.com/nsn/8470-01-591-4438Small:
http://www.armyproperty.com/nsn/8470-01-591-4449Medium:
http://www.armyproperty.com/nsn/8470-01-591-4453Large:
http://www.armyproperty.com/nsn/8470-01-591-4458X-Large:
http://www.armyproperty.com/nsn/8470-01-591-4444XX-Large:
http://www.armyproperty.com/nsn/8470-01-591-44712. Enhanced Combat Helmet -- Marine Corps (ECH-M)
Class I: Uses X-back retention ("X-Harness"); The USMC TAMCN is C01202E (similar to US Army LIN)
X-Small:
http://www.armyproperty.com/nsn/8470-01-592-7348Small:
http://www.armyproperty.com/nsn/8470-01-592-6226Medium:
http://www.armyproperty.com/nsn/8470-01-592-6215Large:
http://www.armyproperty.com/nsn/8470-01-592-6208X-Large:
http://www.armyproperty.com/nsn/8470-01-592-6235XX-Large:
http://www.armyproperty.com/nsn/8470-01-592-62003. Fabric cover (w/o comms flap), ACU Pattern / UCP
Small/Medium:
http://www.armyproperty.com/nsn/8415-01-591-5907Large/X-Large:
http://www.armyproperty.com/nsn/8415-01-591-5918XX-Large:
http://www.armyproperty.com/nsn/8415-01-591-59464. Fabric cover (w/o comms flap), MultiCam / OCP
Small/Medium:
http://www.armyproperty.com/nsn/8415-01-591-5926Large/X-Large:
http://www.armyproperty.com/nsn/8415-01-591-5934XX-Large:
http://www.armyproperty.com/nsn/8415-01-591-59335. Fabric cover, reversible, Woodland/Desert Digital (MARPAT); TAMCN: C0153
X-Small:
http://www.armyproperty.com/nsn/8415-01-582-9684Small:
http://www.armyproperty.com/nsn/8415-01-582-9759Medium:
http://www.armyproperty.com/nsn/8415-01-582-9674Large:
http://www.armyproperty.com/nsn/8415-01-582-9431X-Large:
http://www.armyproperty.com/nsn/8415-01-582-9681XX-Large:
http://www.armyproperty.com/nsn/8415-01-582-87296. Cover, Snow MARPAT
X-Small:
http://www.armyproperty.com/nsn/8415-01-582-9799Small:
http://www.armyproperty.com/nsn/8415-01-582-9809Medium:
http://www.armyproperty.com/nsn/8415-01-582-9827Large:
http://www.armyproperty.com/nsn/8415-01-583-0167X-Large:
http://www.armyproperty.com/nsn/8415-01-592-5255XX-Large:
http://www.armyproperty.com/nsn/8415-01-582-9838