Not quite a parts kit but a whole collection of hard to find Belgian BAR parts.  These fit the FM30 metric BAR and parts are unique and hard to find.  Parts include:

Buttstock (cracked on either side of buffer tube near heal and repaired)

Buttplate

Buffer

Rear Sling Swivel

Bolt, Bolt Link, Hammer

Charging Handel

Bolt Guide

Ejection port Cover

Front Sling Swivel

Trigger guard/gas tube pins

Barrel Base Plate

Rear Sight ladder

Various springs, screws, and a few parts I am not sure what they are