There are a few sites for Metro fanatics like..........
TeamSwift • Index page
Geo Metro Forum - Got MPG?
And some performance parts are available also like cams, gears, valves, etc here....
http://geometroforum.com/pages/3tech
No need to do the fuel pump unless you have an issue. These cars do not usually have problems with the fuel pump since the pump is submerged in fuel even when the tank reads empty. You will find this out when you fill up and can only squeeze 7-8 gallons in a 10 gallon tank that reads empty. It's just the way those gauges are.
Good luck!