I still have my $500 dealer credit from the TDI Goodwill package (turned mine in yesterday) and the dealer is offering to extend it until the end of January 2018. Are there any parts I can get through them that I think I may need... I do think my master cylinder needs replacement, but otherwise, it's most body work and maybe a new muffler b/c the last bit of pipe is missing and it's fairly rusty.