One of my not-so-minor nits with the fancy Acura Plutocrat is precisely that lack, both front and rear. A group pointed out a eBay sale (one-only = sold) of a JDM (Japanese Domestic Market) option on their version of my car; (the phenom is exaggerated too, by the length of hood necessary for a long fwd-5-cyl engine underneath):
A Pop-up, illuminated fibreglass rod! called a 'bumper pole' - you can locate it on front bumpers or rear (or both) depending on what bugs the most. A little bit of wiring fiddle - and an indicator + switch, in cockpit. I do miss the compact size + visibility of the Saab - but the later models were way off my radar for many reasons.
Quite right that these modrin copy-cat 'sleeky look-alikes' completely ignore this absence of all refs, as the hood just drops away and rear is masked by wide pillars. I just may try to run down another kit from that seller; it's at least an Interesting solution.. Hmmm - if you end up with a !=Dodge, you might want a JDM kit too, for some other sleek thang. I have Seller's data.
I.