Maybe I had missed it but I saw sear clappers are available again on autocockerparts. Interestingly these appear to be a new manufacturer and while there are quite a few inconsequential changes between what I believe is an original clapper and these new ones, one change does matter and that's the leads on these. They are very short now and just long enough to reach the top jumper pin on an E1 board. I believe the E2 and maybe some other boards moved to the 2nd jumper position and as you can see in the photos if you had to plug it in there, I don't see how it would fit or at a minimum it's going to be very tight and a bear to get it installed. Just a word of warning for anyone that decides to buy these. One feasible solution is to just make a jumper cable which wouldn't be excessively hard to do being a standard connector, they likely exist on the market for other purposes.
Other changes that don't look like they would matter but just FYI:
1. These appear to be raw cast aluminum now where the old ones are entirely alodine dipped? Total guess on that but point stands, visually different main body.
2. The attachment of the clapper to the guide pin/sear pin is different. I can't tell if the new one is press fit now but it appears the old process was a punch/mushrooming approach for the mechanical attachment and the new one is either that or press fit, not sure.
3. The guide rods, which press against the arm of the sear, have a changed head shape. This is minor, new ones genuinely look better in this regard having a much smoother profile. Probably doesn't matter functionally.
Other changes that don't look like they would matter but just FYI:
1. These appear to be raw cast aluminum now where the old ones are entirely alodine dipped? Total guess on that but point stands, visually different main body.
2. The attachment of the clapper to the guide pin/sear pin is different. I can't tell if the new one is press fit now but it appears the old process was a punch/mushrooming approach for the mechanical attachment and the new one is either that or press fit, not sure.
3. The guide rods, which press against the arm of the sear, have a changed head shape. This is minor, new ones genuinely look better in this regard having a much smoother profile. Probably doesn't matter functionally.