Antenna downlead help

[VK5TM]

Because of where the support poles/structures are in my backyard, I've put up a doublet with 18.5m horizontals and 5m 300 ohm ribbon downlead.

Now the downlead is about a meter out from the central support and with the wind we get down here, it keeps snapping it.

The plan is to pull the antenna down and re-position it to get the downlead closer to the central pole, but I'm stuck on how to support it without the (metal) central support interacting with the downlead.

You used to be able to get, in the days of tv antennas with 300 ohm ribbon, stand-offs about 4" long that mounted to the pole and held the downlead away from it, but haven't been able to find these anywhere now.

I do plan to increase the height of the central pole to 10m at some stage (and increase the length of the downlead ribbon).

100w is the max power I can run with the equipment I have at the moment (with 10w being the norm).

Any ideas welcome.