The Press 40 bulbs in the screw-type base are similar in light output, and are convenient for those who need the extra coverage from a 7" reflector at full power.
The GE #11 bulbs in the screw-type base are similarly bright, and are also convenient for those who need the extra coverage from a 7" reflector at full power.
Flashbulbs are readily available at garage sales, used photo equipment dealers, and antique shops; however, by nature, these sources are sporadic. You may be able to find a photographer in your area who has a case or two tucked away.
But if you want to try a variety of bulbs, or need a steady source, the best bet is to find someone searches out flashbulbs and resells them. See Bill Cress's Flashbulbs.Com web site. Here is a sample of bulbs he has available for suitable for use with Graflex flashguns:
For sync cords, try one of the retailers listed in Where to Get, such as Paramount Cords or Pacific Rim Camera.
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