Blox and Tomahawk are different. Blox usually have a smooth sound signature (well, I've heard that BE7 is more thin sounding with slightly sharper treble).
Tomahawk has got an energetic sound that can be exhausting in the long run for some. The sound is forward and upper mids/treble are enhanced. I really like them, but others hate them so you are taking a big chance when buying them.
You could check out BOE Black Onyx. It seems to be close to the Blox sound. It's a Thai earbud and can usually only be bought directly from the maker(Earbud Thailand), but I saw an Indonesian seller on Ebay selling Black Onyx for $33 with shipping included. I thought about buying but I've already got too many earbuds...
Edit: now the Ebay listing is removed, but you should be able to find Black Onyx from the maker on their Facebook page:
https://www.facebook.com/earbudsthailand/