Are 128Kx8 cache chips hard to find? I was toying with the idea of upgrading my 486 VLB system to 128MB of ram and I would need 512k cache to cache it all. The manual (Gigabyte GA-486VS) says I need 4 128Kx8 and 1 32Kx8 (tag) to do this (there are 8 256k chips plus tag in there now).