I have 2 responses to this.
1) People shouldn't be selling Elite Merchandise, I'm pretty sure it's illegal, but it's definitely not cool
and 2) FD needs to work on the Merchandise it has on offer. The Mug seems rather underwhelming, and I'm not a fan of the T-shirts. I actually had my own collared t-shirt (a golf shirt?) made with Frontier Logo on the sleeve, and Elite logo on the breast.
The pins like you have, some nice subtle collared t-shirts, and perhaps a key-ring that says (my other car is a cobra Mk.III) would sell like hotcakes.