Have one you like? I've seen the Platypus, but curious whether it interferes with front sensors?

Literally the day after I got the car registered here in CA, San Francisco ticketed me for no front plate. Sigh.

 

The Platypus is a good one and generally doesn't cause sensor issues. Another popular choice is the Sto N Sho. It mounts low under the bumper and is easily removable. Either should keep you safe from tickets.

 

I have the Platypus installed for 2,000 miles +/-. It works great, no interference & easy to wash around.

 

The front license ticket is a "fix-it" ticket. So showing that you have mounted it on front will reduce your ticket significantly.
I bought a similar holder a while ago (at much lower price) off Amazon. When I get a ticket, I put the holder on (it's quick), grab some police guy to sign it off (any officer can do it), pay for the cheap 'fix-it' ticket, remove the holder again and move on.
I have 5 cars - none with a front-mounted license plate. I got 2 tickets over about ~10 years in CA. Now all my cars are registered in NV....

 

I bought this one off eBay:
https://www.ebay.com/itm/363999427271

The pictures of the red LC are mine. The plate position is very configurable but there are few positions where there is no interference with the parking sensors so not sure if Platypus provides that flexibility. It's a good plate holder and no complaints here so far. My only gripe is that it uses Philips screws where on my previous car, I had a Grimmspeed mount with Allen screws. Otherwise, you just gotta make sure that you put as much antiseize as you can :-). The one on my previous car is all one piece now.