I removed electronic boards from several MTH signals to interface with my layout electronics. Be aware, these are surface mount parts, except for can electrolytics. Cannot guarantee if they are still functional as they were not placed in static bags (and I should know better 
) after removals. Electronic gurus can easily trace out connections, as all boards use ubiquitous 555 timers.
If you can use them, you can have some or all for shipping cost (negligible weights).
2 pieces 30-11014 highway flasher
4 pieces 30-11024 3 vertical over 3 vertical block signal
1 piece 30-11023 semaphore COIL ONLY (board cannot be found)
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