what state are you in? in SA we dont need blinkers.
the blinkers you posted are the only ever PE blinkers that were available. they came out on some 79 models and all australian 1980-84 PE's. they were also standard equipment on TF farm suzukis and on some of the white 250 and 400/500 Enduro model DR suzukis that were available with compliance plates in
SOME states
Quicksilver i suggest you check out
http://groups.yahoo.com/group/PEmotorcycles/i spent many hours suggesting to to PE owners how to fit blinkers to PE's that never had them fitted, changing to 12 volt and a whole heap more of electrics stuff that probably confuses a lot of people

. it can all be done but depends on how much money you want to spend, how original you want it and how much time you have got to spend to do the mods.
in brief form yes you can get the charging coil off your 250 T stator plate and fit it to your 250 C along with the wiring loom, rectifier, relay, switches etc. and weld on brackets to your frame for the battery holder and rear blinklers. it would be fairly simple to do it that way. another way is a total loss system or even a total loss 12 volt system using a small 12 volt ni-cad type battery that can be mounted behind the headlight, under tank, under seat or in air box. you can then use 12 volt LED globes in the blinkers and you will easily get a few days rides out of the one charged battery using LED globes. you will need to have the blinker circuit separate to all other circuits and you will need a special relay to flash LED globes. when the battery gloes flat you then take it inside and stick it on the charger.
also on the PE forum there i s many CAD drawings of parts to re-manufacture. currently in the works is the battery holder. its all drawn up in CAD and anybody will be able to make a battery holder for a T, X, Z 250/400 & T/X 175
EXACTLY as original, with all details supplied. we havent started on the N 175/250 or Z, D, E 175 battery holder yet though.
also there is drawings to make the original blinker brackets and speedo brackets and more. this info is for members only though.