Westcott Softbox Equipment help

[BuZzZeRkEr]

I got a Westcott Spiderlight TD5 light kit awhile back, I like it but I was trying to add some versatility to it. basically I wanted to be able to throw a speedlight into the softboxes instead of using the TD5's say when I'm outside or just want the versatility of a speedlight in a softbox. So basically I was wondering if Westcott makes a product that will help me do that without having to shell out alot of loot or buying a completely different softbox. Thanks for your help in advance.