Hi, I might have some of the memory spare, but I remember sending some to Aus before for someone from here. I might still have more. I grabbed 4 512MB PC133 sticks from some office PCs sent for scrap and I may have used 2 of them.
Just check the OWC page for iMac G4 RAM upgrades - http://eshop.macsales.com/shop/apple/memory/iMac/G4_700MHz_800MHz particularly where it highlights that it needs 2 different types of RAM - a standard 168pin PC133 SDRAM stick, and a laptop sized SO-DIMM stick for the user-accessible slot. I have the standard 168pin modules, never seen sticks like that in 1GB, although they do exist on eBay etc.
I have T7 and T8 drivers, but alas, I need them for my powerbooks. Like you are finding, they're hard to find, but when I got mine in the UK, they were £3 each, pennies really for Stanley tools. I don't think the big chains will have them, but a small outlet might. I did think about the socketed screwdrivers, but the Torx bits for them tend to jump from T10 to T15 to T20 with nothing in between or below.
I'm in the same boat with my USB 2 iMac G4, desperate to upgrade the RAM from 1GB, but it'll cost more than I paid for it, and I've seen the free OWC video for upgrading the non-customer replaceable RAM, it's an ORDEAL.