Anyone know where I can buy these?

Many companies make them. You'll hafta identify them and find the actual company if you want to keep the identical appearance the same.

 

You can probably get snacks, juices, sodas and popcorn at most stores.

 

https://siffron.com/sign-holders/channel-sign-systems


If you need the inserts printed, we often do them on Polystyrene. The shelf ends are generally printed on 010 PVC.

 

I have been looking for the same type of thing but to hold inserts for an exterior sign where the client can slide different directions onto the main sign.

 

Traditionally called track sign

+1 for Siffron. https://siffron.com/6-track-sign-channel (This isn't exact but might work)

You can also look here at these two other sites:
https://www.theglobaldisplaysolution.com/
https://www.kinter.com/index.html

 

No kidding? I never would have guessed that.

 

Yeah, thanks for that. I also noticed your post really helped the OP immensely..... just like in all of your posts

 

JRS Inc is another alternative.

 

I've done this a few times on outdoor signs using tracks. You can stick them on the sign or fix them with screws, and it's convenient because you can put the top and bottom part separately at whatever distance you need them to be. You can easily find clear tracks too, so they don't stand out too much when looking at the sign. I've done it a few years ago for one of my client who bought a 12'x8' to put on the side of the road to announce upcoming events. I've got two sets of tracks running almost the whole 12 feet and we insert thin coroplast in them, name of the event on top on, and dates on the bottom. We change them 3-4 times a years (not since COVID-19 though).

 

It looks similar to what I used to purchase as a store manager. Maybe try a grocery supply. I included a link to one I used years ago.

https://www.dgsretail.com/C102/Hanging-Retail-Store-Aisle-Signs-and-Markers/