PC clock battery has wires soldered to it: home job to replace?

Factual Questions
1

My old clunker IBM 560X laptop has a clock battery that has two leads soldered to it; and they in turn connect to the motherboard. I had a hell of a time finding a replacement a few years back - so the question is

Is it advisable to remove it unsolder the leads and resolder them to a new CR2032
or should I persevere and buy one ready made?

2

See this page. They have solder-tab lithium coin cells in various sizes, as well as solderable coin cell holders. The latter will allow you to use commonly-available CR3032 cells. Soldering directly to a battery is ill-advised, as the heat can cause damage or leakage.