Sorry to hear that, however as Malc says a LOPT may turn up for it, or alternatively you could follow David's example with his DR123 which continues to work really well with a BRC 1400 Lopt:
https://www.vintage-radio.net/forum/...d.php?t=104681
David's informed me the circuits are similar, he'll be keen to help and advise on the LOPT conversion.
With his help I'm confident your set will live again.
Cheers,
Brian