Is there any possibility of getting batteries for a very old computer in NYC? I'm told I need: P/N 30807 CK-SUM 3A00 SYS. 333 S/L REV A03 and 840 (4.5. volts) The person who's telling me they're unobtainable doesn't speak much English, and I'm not sure he really knows. As a matter of fact, I'd also be grateful for any suggestions of a competent affordable computer repair place in Manhattan. Suggestions are appreciated!