They are squishy but they are only solid on one side. You could try something like a wood plug maybe. It would keep septum funk under control, and you could choose a modest color like a light osage orange, or pink ivory or holly. I'm imagining that your septum must be pretty low if a clear 6g earskin is noticeable.
-Petra-
www.babypietattoo.etsy.com
www.formspring.me/babypietattoo
Left lobe 17mm, Right lobe 3/4, 4g second left lobe, 8g septum (pierced at 16g)