The replacement elements are going for $41.00. I honestly have not tried cleaning them yet but I would imagine that would be a cheaper option to replacement even though they have not recommended cleaning them. Worth a shot before you spend the bucks.
I can get the STI fender braces but they are like 3 times the price of your aftermarket versions. You would be looking at $315 for them. I know, I know, at that totally awesome price you might as well pick up a few sets for your friends too. Maybe a few sets to hold up some shelves at home?
They have teh STI sexy but man, they sure are pricey.
The speaker spacers are one of the only Kartboy products that I do not stock but I can surely get them in for you.