STAGE3ss

Alright, I believe i have an exhaust leak. Sounds like its comming from the "flex" part of the downpipe. I replaced the gasket between the header and downpipe (it was toast), that helped a little but, my questions are-
Ive been looking at clear image headers/downpipe-

Can just the "flex" part of the downpipe be replaced??

what have some been paying for the clear image header/downpipe with cat combo??

also, previous owner had a "cherry bomb" or "glass pack" installed to replace muffler and its sooo loud...
whats a good muffler to use in its place, i dont want to get a full cat-back because i like the stock exhaust. im just looking in to what some have used for just the muffler and how it sound... i dont want raspy at all, just low tone and more quiet then loud. I drive it daily and loud get well LOUD after a while. Thanks for all that help...