Designing a Biotope - Ecuador/Colombia

[Salixx]

So, I am in the designing stages of a terrarium. And, I know that this is a bit "off topic" but, since it is primarily going to be to show off Pleuros from Ecuador and/or Colombia, I kind of decided to ask here.

I'll start with the basics. I am planning on using a 10 gallon aquarium and it will likely have a small aquatic section. There will be no fish. If I can find a dwarf shrimp species native to Ecuador or Colombia I might add it at some point, but the primary focus is on the orchids and plants in general. Lighting will be on the low end since I am going to have shade to bright shade orchids. Temps will be intermediate - warm.

Here is the list of orchids, which I either already own or have on order from Ecuagenera:
Dryadella cristata
D. clavatella
Masdevallia minuta
Masd. nidifica
Masd. pygmaea
Poroglossum muscosum
Scaphosepalum cimex
Scaph. rapax

Now, here is my conundrum. I am looking for other true miniature tropical plants native to Colombia and/or Ecuador to also compliment the 'chids. I haven't started looking for aquatic plants, but I am open to suggestions for them as well.

The problem I am running into is that terrarium plant growers and sellers just don't seem as organized as orchid people (or, I am looking in the wrong place). Many plants sold for terrarium will outgrow them in less than two months unless you consistently trim them, but, as you browse the section they make no mention of that. The other problem is that they don't often list where the plant is native to.

So far, in several hours of researching, I've come up with three-ish:
Peperomia velutina
Pilea microphila
Utricularia sp. (bladderworts, I've only narrowed down to the genus)

I'm looking for a few more options. The Pilea is likely a definite and will serve as a nice carpet plant for the ground area. Other than that, I feel so lost. Orchid peeps have spoiled me- I had my orchids picked out in less than an hour! It's been so bad, I've been considering just sticking with the 'chids and forgetting the other stuff, but I want something in the ground as well.

So if anybody has suggestions for plants, or vendors with complete info, I would love it!

Thanks in advance for any suggestions, advice, etc.