Yamaha TZR125
Yamaha (Belgarda) TZR125R
Yamaha TDR125 (Deltabox)
Yamaha DT125X/RE
Yamaha DT230 Lanza
Yamaha DT200WR
Yamaha WR200
Yamaha (Belgarda) TDR125 & TDR125R
KTM LC2 & Sting
Derbi GPR125 2T
Sachs XTC125
Sachs ZZ125
Best thing to do is use the Fowlers of Bristol website to get the Yamaha part number for anything that you need and then to put this into Ebay, Google, CMSNL to see if its still available.
Always worth looking for new prices first and then looking at second hand if you have to as they can sometimes be "ok" new.