Newhome Kitchenette 153: parts, repair or another old one

Hi,

today it was revealed that my old but loved ‘Newhome Kitchenette 153’ has a leak somewhere in the front.
As this old cooker (ca. 1965) is of ideal worth to me, I would like to have it repaired or repair it myself.
Or buy a new old one.

Perhaps anyone knows:
Are there known typical leakage-problems with these cookers?
Does anyone sell parts for this old cooker?
Is there any company that does repairs on such an old cooker?
Is there any company who sells such oldies?

Thanks in advance for any help,

Joe