Whisker pole to 30mm mask track

[fastjedi]

I've acquired a whisker pole with piston ends.

My Selden mast has a 30mm track on the front edge. All I need is a 30mm Spinnaker car with a ring ....... but its £443!
Any suggestions on a more economical solution?

 

[LadyInBed]

'Adapt' a mast pad eye.