You would be lucky to find anyone else who is even aware of the Audiofrog brand let alone having made fibreglass pods for them.
A guy in Germany makes aluminium housings for high end tweeters which are great value for money, piss easy to install and makes for great imaging when placed correctly. As you haven't stated what speakers you actually have, I don't know if he makes them for what you have but I have linked all his Audiofrog offerings below:
nemez111 | eBay
I use his products myself for my Hybrid Audio Technologies L1 Pro tweeters:
