Thanks Max.
some notes on the DIY:
tools required :
1. drill and good sharp bits.
2. shop vac. ( for getting the rivet debris as you drill out the old rivets )
3. Torx bit set, ( for the header screws )
4. pop rivet tool and assorted length/size pop rivets and washers.
5. another person and about 3-4 hours being VERY careful.
6. some rope/cord to tie the tonneau to something overhead to keep it open during the operation.
7. parallel jaw pliers ( slip joint ) for re-crimping the window gaskets on re-installation.
8. a can of spray white lithium lube. ( no better time to lube up all the joints than when the cover is off )

Try to capture and save the old BIG rivet heads to use as washers during assembly.

It may sound difficult, but it is really not, and well worth saving the 2-3 hundred bucks AND knowing it was done right.

( I printed out all the relevant pages from the SRT6 service manual and put them in plastic sleeves in a notebook for reference - invaluable )