Some exterior lighting questions (corners and fogs)

[FishRunner]

i want to replace my clear corner bulbs (921) with LED so they will look closer to my silverstars...

http://cgi.ebay.com/ebaymotors/2-WH...018QQitemZ280203553803QQrdZ1QQsspagenameZWDVW

anyone ever use anything like these???

I am also looking for good fog bulbs (h3 55wt) so i don't have to upgrade my harnesses...

any suggestions??? silverstars are like 20$ per bulb

can you use HID bulbs in standard stock haresses??