As a secondary option, there's the radium solution. You pay 200 bucks for a few pieces of CNCed aluminum and a booklet of printer paper.
Step 1: feel cheated
Step 2: install on car
Step 3: reassemble car
Step 4: several days later, realize you put your trunk on poorly
Step 5: take off clam again and fix
Step 6: Marvel at how much time was saved and call it even with step 1
Basically the giant PITA to remove the rear clam are those crazy interior bolts for your...(I've forgotten, was it the trunk lid?).
Anyway, I haven't done all their mods (most importantly the battery relocation since that takes 15 mins by itself), but I can still have the clam off in less than 30 mins. It definitely lacks the wow factor of the clam hinge, but the cosmetics of the clam hinge were a deal breaker for me. That rear end is the stuff of nightmares!