Hi Guys, Found exactly what I was looking for in Marlborough, MA. For those interested here is URL. http://www.ruland.com/eng_colr.html The SP-32 series is for a 2in dia mast (2" bore) and is $15.93 for steel split collar , $18.43 for zinc plated steel or $21.72 for the aluminum split collar. Thanks all for the good ideas also. Larry K1UO