Those indicators (curved pieces) can be remade in a cast plastic (which I do) and then painted to whatever original colors, glow in the dark, or custom colors to match the interior/exterior of the car or for that matter the color of the customers eyes... LOL
Would the clear acrylic 'curved or flat' panel (entire plastic piece) need replacing as well?
If you like to send me one for you to check the fit and function after I'm done... this gives you a indication of my restorations... after that who knows...
Nick