Any way to charge a laptop without its charger?

My dog chewed up my laptop charger and it doesn't work anymore. My laptop is a Lenovo Thinkpad T61 which came out in like 2005 or something so they don't really make them anymore and I searched all over the internet for a new charger but i was only able to find the ac adapter cable, which I already have and it works perfectly fine. I need the actual charger. Are there any other ways I can charge the laptop, or is there an external charger or something that I can buy online?

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