You can always order the G-Loc pads off their website or do a phone order:
G-LOC Brakes -
Dave did the homework for us and supplied us with the cross referenced part numbers:
Pad material:
Carbotech Bobcat 1521 = G-Loc GS-1
Carbotech AX-6 = G-Loc R6
Front pad shape F: GP109L
Rear pads shape R: GP491L
Also I'm sure you could sell your used CarboTech pads as well (pretty sure they're still good to use) if you don't want to keep them as a backup, either someone here on TMC or even on the Lotus forum / community would be happy to pick them up.
Some people have put rubber shims in, there's talk about that in different brake threads which help eliminate the rattle. Also top metal plate / spring plate on the top of the front rotors can be retensioned/bent to put more force down on the pad which was designed to help eliminate the rattle. Another TMC thread discusses that as well. Its typically only the fronts that rattle.
Lastly if the brake quiet instructions are not followed as they are indicated on the bottle the pads will rattle and people for the most part think you can just slap on the brake quiet goo and then start mounting your brakes, well you can't. And a generous amount needs to be applied. I've found if done correctly it will keep the brakes from rattling until you track or heat up your brakes a good bit then you'll hear some slight rattling again. However if you tension that spring as I described above and add the goo you should be good to go.