AGS, Exide, Volta, FB all had and have DIN style batteries, ask a proper battery vendor, they might be able to get one for you, the problem is that they are very rare and more expensive than the usual ones too.
I got GS batteries (sold by AGS Pakistan) DIN style for a Daewoo racer and a VW Golf too through a freind in Isb who bought them at some shop in rwp. They were dry and unused - he put them on a bus to Karachi where I got them. Filled with quality electrolyte, boost charge and a trickle overnight - PERFECT STRONG BOSSY batteries.