If you are in the market for some 'smallish' air variable capacitors (i.e. 20 to 130 pF and 20 to 165 pF - both at 4,500 V), I just found two lurking in my ham shack and put them on EBAY. 20 to 130 pF, 4500 V (EF Johnson 154-107) Item #160489352560 20 to 165 pF, 4500 V Item #160489353474 73 Bob, WA2CKY