K10 Radiator hoses

Hi. I'm looking for both radiator hoses upper and lower for a 1991 K10 1,2litre, 40kW.
All I can find is "out of stock", "currently unavailable"....
Any idea, where to get? Link?
Maybe dimensions of the originals built in (curved length, diameter) since mine are definitely not original and leaking.
Do any from later models fit?
Thx
 
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