If you really need fiberglass, try Max-Gain Systems:

http://www.mgs4u.com/index.html

I'm not sure you need fiberglass.    At least one of the  current 
builders of fan dipoles uses 1/2 inch PVC pipe.   It's cheap and easy to 
work.    The old W9INN (SK)  fan dipoles used wooden dowels for 
spreaders on his fan dipoles,   A bit thicker than a pencil.  Again 
cheap and easy to work with.    Fiberglass costs more and if you have to 
cut it, makes an itchy dust that you don't want to inhale.

If you are only doing 1 extra element, you can just tie the ends to the 
same support, only a bit  lower and forget the spreaders.

If you really want fiberglass, maybe some little kids  cheap fishing 
poles, but I still think I would  go a different route.   Anyway, that's 
my story and I'm sticking to it.

73, Steve KW3A

On 8/25/2014 9:22 PM, Mark wrote:
> Hi
>
> I have been looking for an alternative to the electric fence fiberglass
> fence poles for antenna work. I want to build some spacers to convert my
> trapped dipole to a trapped fan dipole. Getting in to the farm store right
> now is pretty challenging. So, what ever I do I need to do through mail
> order. Any ideas are appreciated.
>
> God bless,
> Mark (WZ0K)
>
>
>