[TCML] Triggered spark gaps?

[Carl Noggle]

Hey---

Does anyone have any triggered spark gaps?  The ones I'd like to match 
are 4 1/4 inches square with a 1/2" nylon bolt in each corner, in a 
clamshell design, with the electrodes in a sort of dome on each side.  
They are made of acrylic or polycarbonate, I think.  I can't read the 
mfgr or the model number, but they don't seem to be Maxwell.  The 
trigger is a brass plane sandwiched between the halves of the clamshell 
with a contact screw protruding between the clamshell pieces.  There are 
2 gas fittings.  I need four or five of these, or some info if anyone 
has it.

Thanks much---

Carl