Where to get floater checker?

It has 3 prongs and has a dial indicator to check straightness and thicknes variation.

Where to get them?

C

 

We Made Ours From An Old Floater,we Used 3 Rocker Arm Adjuster Balls For The Floater To Rest On.i Had 3 Rubber Feet [shock Absorbers Like Used On Msd Stuff].i Welded A Piece Of Steel To The Floater To Have A Place For My Dial Indicater To Sit On.i Drilled And Tapped Floater For Adjuster Balls,screwed Them In Then Used A Jam Nut On Each One.it Really Worked Out Well,especially Considering It Was All Stuff I Already Had.

 

any photo of it?