When I bought my 5690, I shipped UPS Express Air. For this, the customs brokerage is built into the shipping costs, so you don't have to pay for any extra on customs. What you DO have to pay for is GST (and PST if your province has PST)....
Make a win98 bootdisk.
Delete everything except for IO.SYS, MSDOS.SYS and COMMAND.COM. (If you can't see these files, you need to go to tools->folder options->views in windows explorer, and uncheck "Hide protected operating...
It's worth an email to ask, but I would doubt they would, since the LCD is quite a bit more delicate than a HDD, and to repace the LCD and "top housing" would be much more dissassembly/reassembly work than taking out the HDD.
http://shinza.com/product_info.php?products_id=46
According to specs listed on the 5690, it SHOULD fit the large... but from what I'm measuring, it doesn't look like it would.
Edit: FYI, I decided to be a guinnea pig and ordered...
Doesn't look like either will fit. Large would barely (exactly?) fit for length and width, however thickness... I measure a little under 2.5" at the back...