mount modification for cases?

[sharkey_imp]

I saw the thread on hard cases from samurider. I am a cheapskate and really don't want to drop $900 for those. Has anybody seen, used, or modified these cases -

[url=http://www.ebay.com/itm/Black-Hard-Saddle-Bags-Trunk-Luggage-Motorcycle-Cruiser-for-Harley-Honda-Yamaha-/171989437961?hash=item280b5e8e09:g:fU0AAOSwo6lWOxOn&vxp=mtr]http://www.ebay.com/itm/Black-Hard-Saddl...On&vxp=mtr

I'm not a fabricator but do you think some steel mounts could be fabricated for these to mount on the bike? I also have a tidy tail kit on mine sans rear fender and small LED turn signals and flashing brake lights. I am gonna guess those need to be extended? How difficult would that be?

I was gonna swing by my mechanic and see what he thought about it but figured the collective might have some ideas.