Does anyone have the dimensions for the hard wood cable guides that are used in 1-26's?

The club needs to replace ours and I don't want to take the glider out of service to remove and measure the existing guides - then wait for the new ones to be made. And I don't want to buy new ones either.

Dimensions needed
---------------------
- Overall length
- Inner diameter
- Outer diameter - small (inside steel tube)
- Outer diameter - large (against steel tube front)

The guide kind of looks like this (round oak dowel material).

+---+ +---+
| | | |
+-+ | | +-+
| | | |
| | | |
+-+ +-+

Thanks in Advance, John