Tanseattle I don't think your divider looks so ugly. Once I wondered if I could cover the part you see of the divider with a piece of aquarium background or something that looks "plant-like" or somehow blends in to the aquarium's theme.
Ok- I have a home made divider, and 2 different brands of store bought. I do not think the store bought ones are anythign great at all. One cracked, and both were really hard to customize, and one brand has such tiny holes that there is one fish with no filter movement and one with all of it. The other one cracked in the mesh part and I had to glue it together and it's a mess. I prefer the DIY method I learned from all of you on this forum. Also, the clips that come with the kits didn't seem to work right on both my 6.6 gallon but also my regular, run-of-the-mill 10 gallon tank that those are supposedly made for. I had to take heavy duty pliers and work with them to try to change the shape so they would stay, they still moved around, and that is when I said "forget it!" and made my own with the report binders and craft mesh.
Now, you just need to think about whether to try it with suction cups or silicone. Yeah, the silicone might be a pain to scrape off . . never tried it but I have ripped off silicone from DIY "hidey hole caves" and tunnels and it comes off ok. Just make sure when you use the suction cups that you don't press them in such a way (too tight against each other on the opposite sides) that they make the divider bow and leave little spaces on the side. It almost helps to position the cups in a more "relaxed" manner. If this sounds confusing I think it will make sense when you try it.
Maybe use more suction cups than I did here.