15!!!??
i saw them for 8$ at Hobby Lobby....
what ive seen people scrap from those are:
-the rims, yep if u know how to take off the rims [kinda hard] you can replace them with the rims they have
-u can use the stickers of course
-some people have used the mufflers
-i say u can also use the spoilers, but i have yet to see it done, i bet they will fit though [with glue or something]..if i see a black touring style spoiler, i will definitly buy one for that

-i would try to see if the front bumper on the modifier is big enough for the bit..if so, you could do a major body mod of cutting off the front of the bit, and replace it with the modifier front
-hehe u could also take the sunroof from it

, but you would have to cut a big hole in your bit