i have just recieved a set of blue indicators for my 93 wrx, got them for £14.99 from auto-cruise ltd, 01623 722203.Although won mine on Ebay, so may be little more from shop ???
Havent seen these under £60 elsewhere, so thought i would try and save u some dosh ....Good Luck

 

Sorry forgot to say, these are quality items with a snug fit, Fitted mine in 5 mins, you just unscrew one nut and undo the connector and then replace with new blue ones...Jobs a good un ..