you're right, there's no listing for that model on Velobase, and I had one just like it that I sold off without actually mounting/using. The main source for the scare about Modolo stems is one website that shows a (infamous) pic of an Xtrenos that failed suddenly and caused (bad) injury to the rider. Rumor was that Modolo recalled some stems and the later models were much beefed-up in areas that had been prone (or suspect) to cracking...but like a lot of this stuff there's more "urban myth" than a lot of fact on the 'net.
Caveat Emptor and YRMV, but an "ounce of prevention", etc.