paper

I brought my car to get chipped today, and while they were soldering it on the ecu broke. The guy there said he didn't remember the name of the place, but that he knew a site where you can get used ones and told me that if i posted on here someone would probably know what he was talking about. also, if anyone has one numbered 8d0 907 557 n (a4 1.8t 97-99.5)for sale that works i wanna buy it. thanks