I am repairing kenwood basic M2

I am repairing kenwood basic M2

I see a kit is offered is it any good ? price ?
Kenwood Basic M2/M2A Modification Kit
from Modification Kits | DRM Audio
which are closed till next year

I also see the original # new
power outputs are on ebay
DAT1521N, DAT1018P also TA2031 ic
are they any good? or not

also I don't see any Datasheets for these parts on line
I just need to know the best dependable way to go is
thanks Mike