Replacing Extinct Key Fob

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So I have an Ungo Alarm System on my car which was installed back in 2001. It came with 2 key fobs which both broke. One just stopped working one day and the other was victim of a missed cross-parking lot toss of my keys . I opened them both and neither is physically broken or seems to be missing any transistors or capacitors or whatever (I'm no electrician) So I went to autozone to see if they could replace it and they said the company that made em is no longer in existence. Best Buy (where I bought it) said the same. So does anybody know of any way I can get my alarm back without buying a whole new system and having the old one taken out? This is what I get for buying el cheapo electronics