Yes. There are forend ejector Lefevers out there and at least one transitional ejector system leading up to the in-frame system seen on most ejector Lefevers. The transitional system has rods in the frame which cock the ejector sear, which is then tripped to release power from the main spring to drive the transitional in-frame ejectors. Complicated, but this elaborate system works fine. The forend system is more quirky and problem prone. I have seen these three types of ejector system. Other Lefever collectors may have seen more.