Trying to find a set or 2 of some rail (round...7/8", I believe) mount rod holders (3-4 holders along a bar of sorts) and having some difficulty locating something already manufactured. Looking to add one to each side of the siderail on a 15' Boston Whaler. These would be mainly used for longlining.

I've seen a few that I like (Millenium or Brocraft) with adjustable height/angle holders, but would have to fabricate some sort of base to clamp on rail in order to make work.

Any suggestions?