1000S used the same as LeMans, not the same as these. These fit SPII, SPIII, Strada, Mille GT. LeMans 4 or 5, 1000s brackets are slightly different and break even easier.
I have a few broken ones of each type. Not both sides but individual pieces.
You'll need to find old stock but the low hanging fruit has been taken by those who want to convert their G5 to a 1000s clone.