[Dave at Pelican Parts]

Basically, anything you do that will give you around 13 ohms resistance should work. As long as it will hold up to over 1 amp of current!

The stock resistance wire is coiled to fit more in the space. Perhaps that could work? Wrap the wire around a thicker wire, then slide that thicker wire out so you have a coil?

Or just look up ceramic resistors and get one or two that add up to 13 ohms.

--DD