Look at the attachment and see the bumblebee stripe options for the Challenger. You can come up with some interesting combos such as:

- EV2 with DY3 painted top and stripe (or the inverse)
- FK5 with EK2 stripe (I've seen some, but how about adding the painted top too?)
- TX9 with any funky High Impact stripe and, perhaps, the same painted top
- BL1 with EK2 stripe and painted top

I think you get the idea! Maybe even look at some clothing of yours and see if there are some interesting combos that may match the paint codes of for the Challenger.