[Elecraft] OT - Source for Air Variable Capacitors

[Dauer, Edward]

With the tutelage of a friend I am putting together a mag loop but have had no luck finding a source of air variable capacitors up to the task.  Vacuum variables aren’t hard to find, but the $200 and up price tag is offputting.  I have seen a couple of AVCs on E-bay that looked pretty ratty; and the commercial types for sale new look like low-power trimmers.  Anyone know of a source --  or even have any they’d sell?  Specifically I would like a range of 6 to 120 pf or more, butterfly or split stator, with plate spacing sufficient to take a kilovolt of RF.  And ideally with reduction gear tuning though that’s optional.

Thanks for any info anyone can provide . . .

Ted, KN1CBR