I have 6 each Tung-Sol JAN-CTL-6L6WGB (also marked on glass 5881) tubes that are re-packs. They have been tested and are guaranteed. Minimum Mhos is 3150, these all tested 3200 Mhos and higher on a TV-3B/U military tester. $3 each plus postage. Thanks, Steve Hilsz jydsk at tds.net and I take PayPal.