64 Deluxe steering wheel help

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I recently picked up a deluxe steering wheel that was missing the horn hardware, which I acquired separately. Everything appears correct except the plastic retainer as the 3 raised areas are too tall and the horn assembly flops around. It appears these retainers are color coded and I have 2 different versions now... the red one in the picture (which is too tall) and a white/clearish one (which is too short).

As a reference I have the same wheel outlined in this thread that I followed for assembly. http://67-72chevytrucks.com/vboard/s...d.php?t=637192

I could really use height of the correct retainer so I can either find the right one or simply modify the tall/red one. Thanks!!