The Euro type is the military usage. SAAMI will be tighter and less forgiving.

Dave Manson: http://www.mansonreamers.com
(7.62x39; 7.62x54R listed; 5.45x39 reported; call for listing)

Clymer: http://www.clymertool.com
(7.62x39; 5.45x39 reported, call for listing)

Forster: http://www.forsterproducts.com
(7.62x54R listed - call for others)

Pacific Tool and Gauge: http://www.pacifictoolandguage.com
(5.45x39 reported, call for listing)

Numrich Gun Parts: http://www.e-gunparts.com
(7.62x39 listed - call for others)

Midway USA: http://www.midwayusa.com
(call for listing)

Bentmetal: http://bentmetal.homestead.com/headspace.html
(5.45x39 currently listed as "coming soon")

Clymer and Forster can also found at http://www.brownells.com