[USA] FAA approved canopy crack repairs

Our trusty Grob 103 is undergoing an 'extension of life" inspection
(AKA 6000 hour inspection)
One of the issues is with minor repairs to its front canopy.
We have one small crack starting from the right rail, less than 2
inches in length and well out of line of sight.
The plan was to do the usual repair by stop-drilling then fixing with
'Acryfix'

The inpector is looking for "FAA approved data" or existing "guidance"
to allow a return to service with this fix.
Without this we will need a new canopy.

I am not looking for "we've always done it that way" types of
responses.
Anybody got any formal documentation that would satisfy the FAA that
this repair is allowed?

Thanks,

--Jim