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Well I've been off the grid for a bit!
Dave, regretfully we are no longer manufacturing the 194 and 74 bulbs. We had too many failures that we were replacing faster than we could sell new. To top that off chip warranties were becoming difficult. To save headaches and hassles those lines were cut from production. As far as your twist lok concerns go, the stock bulbs should pop right out. No need to buy new ones unless they're damaged in some way.
sent from a likely flagged smartphone.