Does anyone know if Hagen still make a classic 12v 36aH which will fit in LWB battery boxes at all?

I would like to try and find a pair of Hagens for my 2.5 SR project as the ACO scrutineering forms confirms these were fitted in '72. Alternatively I would be prepared to fit a pair of hard rubber batteries from say Shield and have Hagen logo stickers made up to go over the Shield ones.

Name:  6V W-Hagen.jpg
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(This is a 6V Hagen so not correct)

All suggestions/advice welcome.