I'm considering buying an older sailplane that needs new wings built as the old ones have dry rot.

What I'm wondering is if I'll need to get a new AW date when the wings are replaced. Wings are no longer available and extremely scarce (only 3 left in the world), so I would need to build a new pair using the original factory drawings without any modificationsThe wings would be identical to a new pair from the factory (the factory, Sheibe in Germany, is still in business but haven't made this plane since the early 60s).

The sailplane is currently registered as Experimental - Racing/Exhibition with an AW date of 1980 (the old rules that don't require annual requirements to notify the FAA of all flights, dates and locations in advance) so I really don't want to get a new date with stringent requirements.

Would new wings necessitate a new AW date? r is there a way to keep the old AW date?