<VV> 60-62 Road draft tube mount and seal

[tkalp at cox.net]

Getting ready to put the road-draft tube on my '61 Greenbrier engine.  It has a smaller bead or bump on the end that goes into the top cover than later PVC engines.  Looks like there was a fiber washer that slipped over the pipe and was used to clamp onto with the standard fork clamp.  The washer I had broke and Clark's part is discontinued.  So how are you guys mounting and sealing the road draft tube?

T. Kalp
Wichita, KS