I've been researching the different luggage and rack combinations and thought I'd start a thread as a reference...
I'm only looking at side cases for now.
What I've discovered so far is the Suzuki OEM bags (part number 990D0-V3500-000) are the same as the Givi V35 PLX cases.
They will fit on either the Suzuki OEM racks, the Givi PLX539 racks or the SW-Motech Quick-Lock Contour carrier racks (KFT.05.403.150).
Now some pics and prices.
Suzuki OEM 
MSRP: $455.95
Oneida Suzuki Price: $361.99 plus shipping (approx $40)
Color match inserts are available for about $100 shipped
990D0-V35SC-___
Suzuki Side case mount (990D0-17H00-065)
MSRP: $208.95
Oneida Price $163.99 plus shipping
I think you also need the Side Case Mount Bar (990D0-17H00-060) if you don't have a top case
Add $85-$100 for that!
Givi V35N PLX 
Twisted Throttle prices $490.50 (Matte Black)
Add $58.50 for most color inserts
Shipping is about $45 to west coast.
Givi side case mounts (PLX539)
$207.90 plus shipping at Twistedthrottle.com
SW-Motech Quick-Lock Contour Carrier for Givi V35 PLX cases
(KFT.05.403.150)
$229.99 plus shipping
Add $39.99 for Lockable quick locks.