CPD lists the S3 Hardrock pegs as fitting the following bikes. If this is accurate, it's a good cross reference.
RIEJU (19-Up) MR, MR Pro, MR Racing
GasGas (98-18) EC, EC F, MC
Husqvarna - (15-Up) TC 65
KTM - (92-16) EXC, EXC-F, XC, XC-F, SX, SX-F, XCW-F
Husaberg (09-14) FC
Montesa (14-Up) 4Ride (Not 4RT)
Beta (06-19) RR, RR 2T, RS 4T, RR 4T, RR-S 4T, XTrainer
Fantic (16-Up) XE, XEF, XX, XXF